Simple for you guys i guess, But tough for me - Guess I am just thick!
x^4 +Ax^3 + 5x^2 + x + 3 = (x^2 +4)(X^2 -x +B) +Cx +D
I get:
x^4 +Ax^3 + 5x^2 + x + 3 = X^4 -x^3 - 4x^2 + Bx^2 - 4x + 4B + Cx + D
Now, I think i need to simplify this more because i can't compare co-efficients can...
So if X^2 is below something(Demoninator i think you call it?) and its multiplyed by itself, It cancels each other out?
Just trying to get my head around this, Quite confused lol.
Basically X^2 [Multiplied by ] A/X^2 Cancels X^2 leaving A/ Nothing.
Wow that's confusing!
So can you quickly type out (X^2 - A/x^2)^2 Please
Because i get:
+x^4 - A/x^4 - A/x^4 + A^2/x^4
Just want to know how X^4 cancel each other out? Or have i done this basic step wrong in the first place.
How do you make it look like that?
My layouits are unclear so i think you've given the wrong explanation(My fault).
Wondering how its 2A/Nothing
Rather than
2A/x^8
From -A/x^4 -A/X^4
SOmehow they cancel each other? (The bottom bits) leaving 2A/ Nothing.
One more question, a new identity but basically expanding with fractions.
(X^2 - A/X^2) (X^2 - A/X^2)
= X^4 - A/X^4 - A/X^4 + A^2/X^4
X^4 - 2A/x^8 + A^2/X^4 ?
But is the 2A/X^8 Correct? Sure its wrong?
Bingo, gee that's easy ... but i always think that, then ill try a new one and get confused again.
These books I am learning from arn't to clear.
Thanks guys,
Ax^2 + Bx - A - B +C = 3x^2 + 2x - 1
A = 3
B = 2
-A -B + C = -1
-3 -2 + C = - 1
C = 4
-5 + 4 = - 1
Excellent.
Find the Values of the constants in the following indentities.
A(X^2 -1) + B(X - 1) + C = (3x -1)(x +1)
AX^2 - A + Bx - B + C = 3x^2 + 3x -x -1
Ok, Is this correct so far?
AX^2 = 3x^2 :. A = 3
Is correct ?
Bx = 3x = b = 3 ?
C = -1 ?
I'm sure this is wrong, I just need...
Find the numbers M and N such that:
5+4x -x^2 = m - (x - n)^2
for all real values of x.
If someone could work this out, Then ill show my workings and ask questions (its to do with the arrangements of N^2 after expanding brackets mainly.
Thanks in advanced,
ASMATHSHELPME
Hi,
I've tottally confused myself over the mutiplying rules.
Can someone please tell me all the rules
+x+ =
-X+ =
+X- =
-X- =
Because I am stupid and keep messing up my polynomials with them.
look forward to posting many easy questions for you guys, Dam some of this stuff is...