Question

How do I solve this?

Answer 1

So firstly, solve -2^3:
`-2=-8-x^2+7`

Next, combine like terms:
`-2=-x^2-1`

Next, add 1 on both sides of the equation:
`-1=-x^2`

Next, multiply both sides by -1:
`1=x^2`

Next, square root both sides:
`+/-√(1)=x`.

Next, solve it twice, once with the + symbol and once with the - symbol:

`+√(1)=x\\ 1=x`

`-√(1)=x\\ -1=x`

In short, x = -1, 1

Answer 2

(-2) = (-2)^3 - x^2 + 7

-2 = -8 - x^2 + 7

-2 = -x^2 - 1

x^2 = 1

x = +/-1

answer

x = -1 , 1