# Help me with quadratic equations

1. Nov 19, 2007

### frankensteak

i learned this a few weeks ago and now i have a project due tomorrow and i want to make sure in doing this right before i make useless graphs...

like: (x-1)^2+3

or (x+2)^2

i cant remember how to exponent that ****...

2. Nov 19, 2007

### Math Jeans

(x+a)^2=x^2+2xa+a^2

Was it the question that you were asking that was cencored? Or are you asking how to graph the functions?

Last edited: Nov 19, 2007
3. Nov 19, 2007

### frankensteak

how did you do that

4. Nov 19, 2007

### frankensteak

how to (x+5)squared

5. Nov 19, 2007

### Math Jeans

Think of it this way.

12^2 =(10+2)*(10+2)=10*10+10*2+2*10+2*2=100+20+20+4=144
(x+a)^2=(x+a)*(x+a) =x*x+x*a+x*a+a*a=x^2+2xa+a^2

Are you familiear with FOIL?

(x+5)^2 (a=5)=x^2+2ax+a^2=x^2+2*5*x+5^2=x^2+10x+25

6. Nov 19, 2007

### frankensteak

no.. i get it..

i tried to find my notes but organization isnt really my thing..
but i got it now, thanks to you! :D

mucho grassy ass