SOLUTION: Using the factoring method, solve for the roots of each quadratic equation. Be sure to place the equation in standard form before factoring. check yuor answer... Can you help me s

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Using the factoring method, solve for the roots of each quadratic equation. Be sure to place the equation in standard form before factoring. check yuor answer... Can you help me s      Log On


   

Question 141496This question is from textbook Beginning Algebra
: Using the factoring method, solve for the roots of each quadratic equation. Be sure to place the equation in standard form before factoring. check yuor answer...
Can you help me solve this?...
Page 344
#12
9x^2=81 This question is from textbook Beginning Algebra

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
dividing by 9 __ x^2=9

subtracting 9 __ x^2-9=0

factors of -9 that sum to 0 ... like 3 and -3

(x+3)(x-3)=0

x+3=0 __ x=-3

x-3=0 __ x=3