9+16=x^2

Solution for 9+16=x^2 equation:

Simplifying
9 + 16 = x2

Combine like terms: 9 + 16 = 25
25 = x2

Solving
25 = x2

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1x2' to each side of the equation.
25 + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
25 + -1x2 = 0

Add '-25' to each side of the equation.
25 + -25 + -1x2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + -1x2 = 0 + -25
-1x2 = 0 + -25

Combine like terms: 0 + -25 = -25
-1x2 = -25

Divide each side by '-1'.
x2 = 25

Simplifying
x2 = 25

Take the square root of each side:
x = {-5, 5}