-7x^2+64+28=0

Solution for -7x^2+64+28=0 equation:

Simplifying
-7x2 + 64 + 28 = 0

Reorder the terms:
64 + 28 + -7x2 = 0

Combine like terms: 64 + 28 = 92
92 + -7x2 = 0

Solving
92 + -7x2 = 0

Solving for variable 'x'.

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

Add '-92' to each side of the equation.
92 + -92 + -7x2 = 0 + -92

Combine like terms: 92 + -92 = 0
0 + -7x2 = 0 + -92
-7x2 = 0 + -92

Combine like terms: 0 + -92 = -92
-7x2 = -92

Divide each side by '-7'.
x2 = 13.14285714

Simplifying
x2 = 13.14285714

Take the square root of each side:
x = {-3.625307868, 3.625307868}