(a-9)(a+9)=0

Question

Solve the equation!!!!!!!!!!!!!!!!!!

Answer 1

To solve this, you want to set each of the parentheses equal to 0 and then solve for the variable.

a-9=0  To solve for a, add 9 to each side, making a=9.

a+9=0 To solve for a here, subtract 9 from each side, making a=-9.

The final answer is a=-9,9