SOLUTION: use factoring to solve the following equations: 9x^2-16=0 i tried (3x-4)(3x-4) but this is wrong. then I thought about using the square root property, but the instructions say fa

Algebra ->  College  -> Linear Algebra -> SOLUTION: use factoring to solve the following equations: 9x^2-16=0 i tried (3x-4)(3x-4) but this is wrong. then I thought about using the square root property, but the instructions say fa      Log On


   

Question 28706: use factoring to solve the following equations:
9x^2-16=0
i tried (3x-4)(3x-4) but this is wrong. then I thought about using the square root property, but the instructions say factoring.
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
you were nearly correct....

(3x-4)(3x+4) is the factored version of the quadratic.

So, (3x-4)(3x+4)=0 which implies that
either (3x-4) = 0 OR (3x+4) = 0
--> 3x = 4 OR 3x = -4
--> x = 4/3 OR x = -4/3

jon.