9x^2-21=-5

Solution for 9x^2-21=-5 equation:

Simplifying
9x2 + -21 = -5

Reorder the terms:
-21 + 9x2 = -5

Solving
-21 + 9x2 = -5

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + 9x2 = -5 + 21

Combine like terms: -21 + 21 = 0
0 + 9x2 = -5 + 21
9x2 = -5 + 21

Combine like terms: -5 + 21 = 16
9x2 = 16

Divide each side by '9'.
x2 = 1.777777778

Simplifying
x2 = 1.777777778

Take the square root of each side:
x = {-1.333333333, 1.333333333}