4x^2-9=55

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Solution for 4x^2-9=55 equation: 


Simplifying
4x2 + -9 = 55

Reorder the terms:
-9 + 4x2 = 55

Solving
-9 + 4x2 = 55

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 4x2 = 55 + 9

Combine like terms: -9 + 9 = 0
0 + 4x2 = 55 + 9
4x2 = 55 + 9

Combine like terms: 55 + 9 = 64
4x2 = 64

Divide each side by '4'.
x2 = 16

Simplifying
x2 = 16

Take the square root of each side:
x = {-4, 4}

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