5x^2-9=71

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Solution for 5x^2-9=71 equation: 


Simplifying
5x2 + -9 = 71

Reorder the terms:
-9 + 5x2 = 71

Solving
-9 + 5x2 = 71

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 + 5x2 = 71 + 9

Combine like terms: -9 + 9 = 0
0 + 5x2 = 71 + 9
5x2 = 71 + 9

Combine like terms: 71 + 9 = 80
5x2 = 80

Divide each side by '5'.
x2 = 16

Simplifying
x2 = 16

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

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