4x^2-36=-81

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Solution for 4x^2-36=-81 equation:


Simplifying
4x2 + -36 = -81

Reorder the terms:
-36 + 4x2 = -81

Solving
-36 + 4x2 = -81

Solving for variable 'x'.

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

Add '36' to each side of the equation.
-36 + 36 + 4x2 = -81 + 36

Combine like terms: -36 + 36 = 0
0 + 4x2 = -81 + 36
4x2 = -81 + 36

Combine like terms: -81 + 36 = -45
4x2 = -45

Divide each side by '4'.
x2 = -11.25

Simplifying
x2 = -11.25

Reorder the terms:
11.25 + x2 = -11.25 + 11.25

Combine like terms: -11.25 + 11.25 = 0.00
11.25 + x2 = 0.00

The solution to this equation could not be determined.

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