Question

Solve each equation.

4 = x2 -7

Answer 1

Do you mean
\[4=x^2-7\]?

Answer 2

yes sir !

Answer 3

Group numbers in one side,
\[4+7=x^2\Rightarrow 11=x^2\]
Then, take the square root of both members,
\[\pm\sqrt{11}=x\]