SOLUTION: My son has just entered grade 8 in high school and has asked me to solve this equation, 9x�-36=9(x�-4)-9(x+2)(x-2) he says x=? I would be greatfull for any help Thanks John

SOLUTION: My son has just entered grade 8 in high school and has asked me to solve this equation, 9x�-36=9(x�-4)-9(x+2)(x-2) he says x=? I would be greatfull for any help Thanks John

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Question 155296: My son has just entered grade 8 in high school and has asked me to solve this equation,
9x�-36=9(x�-4)-9(x+2)(x-2) he says x=?
I would be greatfull for any help
Thanks
John
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
9x�-36=9(x�-4)-9(x+2)(x-2)
9x�-36=9x�-36-9(x�-4)
9x�-36=9x�-36-9x�+36
-36=-36-9x�+36
0=0-9x�+36
9x�=36
x�=4
x = sqrt(4)
x = {-2,2}
.
x is plus or minus 2

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