
Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:23 AM
micromass

1 
38,995 
hi, I was wonderin how i would solve for X in the following equation...
0 = 60x^2  90x^4
If i do add 90x^4...

Dec804 07:42 PM
JonF

12 
2,048 
Intro:
I'm starting college this fall. I asked one of my professors if we had a textbook and he said that there's an...

Aug1412 07:46 PM
ilovemynny

3 
1,094 
Hi, I am getting frustrated with trying to solve this equation:
sqrt(x+9)  sqrt(x6) = 3.
I know that the...

Mar408 08:45 PM
yoyo

2 
6,007 
How do you go about solving implicit equations for y in terms of x that look like these?
y2 + yx = 1
and
y3 +...

Oct1811 10:05 PM
Mentallic

3 
1,274 
Here it is
(x^4)(3x^3)(3x^2)+2 = 0
Two solutions are
x = 1  i
x = 1 + i
How...

May207 04:37 PM
jlee00

6 
16,541 
I want to solve the onedimensional heat PDE backward in time ∂u/∂t = ∇2u = ∂2u/∂x2 , x element of
Basically, I...

Nov2913 04:43 AM
Curl

0 
515 
Hello,
Can someone tell me if what I am doing is correct. I am trying to solve this equation of 0 = n ( p  p0 )...

Oct1311 06:14 PM
mathman

3 
1,690 
Im trying to solve (4x4)/(x+2)< 2x3
I get it down to 0<(2x+1)(x2) if x+2>0
0>(2x+1)(x2) if x+2<0
...

Aug505 05:44 AM
lurflurf

3 
2,327 
Really need help here. I somehow missed a fundamental principle and I have an Analysis exam tomorrow
I need to use...

May3010 04:02 PM
K29

0 
1,030 
Hello, I need your help please?
It might seem obvious to you but I can't seem to get my head around how to solve...

Aug1303 04:33 PM
suffian

11 
3,974 
I'm currently developing a program which solves the displacement of an object using the standard acceleration equation...

Jan1812 10:23 PM
chiro

1 
1,390 
another little bit of help and this is NOT a homework assignment this is for an exam i need to understand it
the...

Apr2104 05:18 AM
matt grime

1 
2,895 
I'm taking a step back as I've found a concept I'm struggling with. If I have an equation:
2(x1)/3 = (x/4)+1
...

Feb1812 05:05 PM
Mentallic

4 
1,570 
Hi. I don't understand how a solution to a linear system is obtained (for example geometrically; don't consider the...

Jan314 06:15 PM
1MileCrash

2 
538 
Greetings all, I'm doing a refresh of calculus and physics in preparation for getting back to school this fall after a...

Aug2208 05:23 AM
HallsofIvy

10 
2,073 
Hi,
I am a college freshman and have taken Calculus I,II,III (covering derivatives, integrals, series and vectors)...

Jul3009 10:37 PM
symbolipoint

2 
902 
I'm curious to understand why there are such equations that cannot be solved with elementary methods, but rather only...

Apr209 08:34 AM
CRGreathouse

4 
2,017 
Hello;
I do not have any experience in solving nonlinear recurrence relations, so I was just wondering how one...

Oct310 11:27 AM
Petr Mugver

3 
2,744 
so i'm doing these lagrangian multipliers in calc class and it involves nonlinear systems and apparently the...

Oct2307 09:03 PM
ice109

2 
1,744 
I need help solving for any other information about the red triangle. Due to the extremely limited information I...

Jul1513 04:11 PM
verty

3 
612 
Ok first i'd like to note that i'm not good at mathematics and have a vague understanding of the conjecture. What i'd...

Feb1108 08:26 PM
wildman

1 
1,373 
Hi guys, I have attached my derivation in the image below. Im not solving the ode, but I need a relationship in this...

Jan2311 11:43 AM
thavamaran

0 
778 
I am just wondering, is there any gerneral method in solving PDE's or just by guess works??
thanks...

Dec1304 11:18 PM
dextercioby

3 
1,127 
Hi
I need help to solve the polynomial equation
27X4+4KXK=0 (K=0.9715)
Any one can help me
Thanks
Rao

Apr705 09:30 AM
dextercioby

1 
913 
we assume a,b,c,d are unknown variables,whose solution are either 0 or 1.So a power of a variable equals to...

Apr2212 11:55 PM
scn7th

12 
2,078 
The terminal side of an angle theta in standard position passes through (2,3). What is sec theta?
How would...

Sep708 05:49 AM
HallsofIvy

2 
2,491 
I know for ##ax^2+bx+c=0##,
x=\frac{b^+_\sqrt{b^24ac}}{2a}
Using ##x^23x4=0##, we know it is equal to...

Nov1613 04:06 AM
yungman

2 
625 
I just found this really old book. In it, I found a way of solving quadratic equations using calculus. Ive never seen...

Jan1810 06:34 AM
duke222

25 
5,202 
Hi,
I've done a response surface analysis, resulting in an equation of the form:
P= A + B*X + C*X^2 + D*Y +...

Oct711 02:57 PM
Mute

3 
1,014 
when solving a system of simultaneous equations in matrix from (with the LHS = 0) why does the determinant of the...

Mar1511 01:40 PM
Mark44

1 
1,765 
Is there any way of solving \int_{0}^{1} \frac{1}{\sqrt{100x^5}} dx by some regular method? If not, how does one go...

Apr1105 06:17 PM
dextercioby

8 
900 
(This isn't homework, so I guess it'd go here...)
Okay, so I'm trying to solve a system of equations with a...

Jun2314 06:14 PM
FysixFox

12 
1,931 
I can easily solve systems of equations with no complex numbers, could somebody give a short overview of the easiest...

Nov307 04:32 PM
arildno

4 
11,004 
I've stumbled upon a system of equations that involves trig functions...
100cos(θ) + 200cos(ω) = 250
100sin(θ) +...

Sep513 01:32 PM
verty

8 
2,071 
Hi,
I am trying to understand the binomial theorem, and would appreciate any insight or pointers.
To make notation...

Nov1011 09:08 PM
Tarty

6 
2,109 
2x+3y = 7, > equation1
2x^23y^2 = 25; > equation2
first of all tell me the type of equations
first i solve...

Dec610 05:44 AM
sjb2812

3 
797 
Hello,
abs(x²  4)^(x²  x  6) < 1
here's my work:
1. taking the log of both sides (can i do this even if...

Feb908 02:09 PM
jhicks

6 
1,961 
hey good people, i'm having a problem with how to solve a problem i'm having.
first of all, I am working on an...

Jun413 10:29 PM
slicer4ever

1 
494 
Hi,
The problem is to solve
(1g_{i+1})P_{i+1}P_{i}+g_{i1}P_{i1}=0
for P_{i}
with boundary condition...

Aug511 09:46 AM
Dickfore

4 
1,416 
i want to solve tan (f(x)) = g(x) ..also i want to determine all the possible solutions!
which numerical method i...

Sep1211 12:25 PM
Floid

3 
1,126 