4-5x^2=-66

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Solution for 4-5x^2=-66 equation: 


Simplifying
4 + -5x2 = -66

Solving
4 + -5x2 = -66

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + -5x2 = -66 + -4

Combine like terms: 4 + -4 = 0
0 + -5x2 = -66 + -4
-5x2 = -66 + -4

Combine like terms: -66 + -4 = -70
-5x2 = -70

Divide each side by '-5'.
x2 = 14

Simplifying
x2 = 14

Take the square root of each side:
x = {-3.741657387, 3.741657387}

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