-16x^2+91=0

Solution for -16x^2+91=0 equation:

Simplifying
-16x2 + 91 = 0

Reorder the terms:
91 + -16x2 = 0

Solving
91 + -16x2 = 0

Solving for variable 'x'.

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

Add '-91' to each side of the equation.
91 + -91 + -16x2 = 0 + -91

Combine like terms: 91 + -91 = 0
0 + -16x2 = 0 + -91
-16x2 = 0 + -91

Combine like terms: 0 + -91 = -91
-16x2 = -91

Divide each side by '-16'.
x2 = 5.6875

Simplifying
x2 = 5.6875

Take the square root of each side:
x = {-2.384848004, 2.384848004}