Question

Which is a solution to (x - 2)(x + 10) = 13 ?

Answer 1

The answer is:
x=3,-11

Answer 2

2 and -10.

Explanation:

(x-2)(x+10)=13

`x^(2) +10x-2x-20 =13`

`x^(2) +8x-20 =13`

`x1=\frac{-8+\sqrt[2]{64-4(-20)} }{2}`

`x1=\frac{-8+\sqrt[2]{64+80} }{2}`

`x1=(-8+12 )/(2)`

`x1=2.`

`x2=\frac{-8-\sqrt[2]{64-4(-20)} }{2}`

`x2=\frac{-8-\sqrt[2]{64+80} }{2}`

`x2=(-8-12 )/(2)`

`x2=-10.`