Finding a,b from roots of equition

[MrNeWBiE]

Homework Statement

If x = -1; 1 are the two roots of the equation x^2 +ax+b = 0; then find the values of a and b.

The Attempt at a Solution

x^2+ax+b=0

(x-1) (x+1)= 0 ,,,,,, by expanding

x^2-1=0 ,,,,, so a=0 , b=-1

is it right or the question is asking for something eles,,,, ?

 

[dacruick]

look slike you got it.

 

[MrNeWBiE]

yay ,,,

look like am getting better everyday ^^

thx to this forums