9x^2-42-15=

Solution for 9x^2-42-15= equation:

Simplifying
9x2 + -42 + -15 = 0

Reorder the terms:
-42 + -15 + 9x2 = 0

Combine like terms: -42 + -15 = -57
-57 + 9x2 = 0

Solving
-57 + 9x2 = 0

Solving for variable 'x'.

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

Add '57' to each side of the equation.
-57 + 57 + 9x2 = 0 + 57

Combine like terms: -57 + 57 = 0
0 + 9x2 = 0 + 57
9x2 = 0 + 57

Combine like terms: 0 + 57 = 57
9x2 = 57

Divide each side by '9'.
x2 = 6.333333333

Simplifying
x2 = 6.333333333

Take the square root of each side:
x = {-2.516611478, 2.516611478}