-8x^2+7+8=0

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Solution for -8x^2+7+8=0 equation: 


Simplifying
-8x2 + 7 + 8 = 0

Reorder the terms:
7 + 8 + -8x2 = 0

Combine like terms: 7 + 8 = 15
15 + -8x2 = 0

Solving
15 + -8x2 = 0

Solving for variable 'x'.

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

Add '-15' to each side of the equation.
15 + -15 + -8x2 = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -8x2 = 0 + -15
-8x2 = 0 + -15

Combine like terms: 0 + -15 = -15
-8x2 = -15

Divide each side by '-8'.
x2 = 1.875

Simplifying
x2 = 1.875

Take the square root of each side:
x = {-1.369306394, 1.369306394}

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