Question

please solve this equation​

Answer 1

Explanation:

First, take the 20 to the other side so the equation is equal to 0. Now the equation should look like this: x²-8-20 =0. Now factor the equation using the big X. What multiplies to -20 and adds to -8? The factors should be (x-10) and (x+2). To find what x is equal to make the factors equal to 0. (x-10)=0 is 10 and (x+2)=0 is -2.

Answer 2

Explanation:

x square + 8x = 20

x square + 8x -20 = 0

x square + 10x - 2x - 20 = 0

×( 1x + 10 ) - 2( 1x + 10 ) = 0

( 1x + 10 ) ( x - 2 ) = 0

x = -10 , x = 2