-3X^2+90=0

Solution for -3X^2+90=0 equation:

Simplifying
-3X2 + 90 = 0

Reorder the terms:
90 + -3X2 = 0

Solving
90 + -3X2 = 0

Solving for variable 'X'.

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

Add '-90' to each side of the equation.
90 + -90 + -3X2 = 0 + -90

Combine like terms: 90 + -90 = 0
0 + -3X2 = 0 + -90
-3X2 = 0 + -90

Combine like terms: 0 + -90 = -90
-3X2 = -90

Divide each side by '-3'.
X2 = 30

Simplifying
X2 = 30

Take the square root of each side:
X = {-5.477225575, 5.477225575}