Question

What are the values of the variable in 37 = 30 − x2?

Answer 1

37 = 30 - x^2
Subtract 30 from both sides
7 = - x^2
Divide both sides by -1
-7 = x^2
Take the square root of each side to clear the second power.
x = + - i sqrt7
Since you take the sqrt of a negative number the answer is imaginary.

Answer 2

30−x2=37

−x2+30=37
−x2+30−30=37−30
−x2=7
−x2−1=7−1
x2=−7
x=±√−7

Hoped I helped!