4x^2-13=87

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Solution for 4x^2-13=87 equation: 


Simplifying
4x2 + -13 = 87

Reorder the terms:
-13 + 4x2 = 87

Solving
-13 + 4x2 = 87

Solving for variable 'x'.

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

Add '13' to each side of the equation.
-13 + 13 + 4x2 = 87 + 13

Combine like terms: -13 + 13 = 0
0 + 4x2 = 87 + 13
4x2 = 87 + 13

Combine like terms: 87 + 13 = 100
4x2 = 100

Divide each side by '4'.
x2 = 25

Simplifying
x2 = 25

Take the square root of each side:
x = {-5, 5}

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