Question

Please help meee and show all steps please!!!ty

Answer 1

x = -4 and x = 5

Explanation:

Since
`x^2 + 2x` and
`3x + 20` both equal to y, we know that the expressions equal to each other. We can write a new equation base on that.

`x^2 + 2x = 3x + 20`

Now we solve the equation.

`x^2 + 2x = 3x + 20`

`x^2 - x = 20`

`x^2 - x - 20 = 0`

`(x + 4) (x - 5) = 0`

`x + 4 = 0 ; x -5 = 0`

`x = -4 ; x = 5`