16x^2-9=91

Solution for 16x^2-9=91 equation:

Simplifying
16x2 + -9 = 91

Reorder the terms:
-9 + 16x2 = 91

Solving
-9 + 16x2 = 91

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 + 16x2 = 91 + 9

Combine like terms: -9 + 9 = 0
0 + 16x2 = 91 + 9
16x2 = 91 + 9

Combine like terms: 91 + 9 = 100
16x2 = 100

Divide each side by '16'.
x2 = 6.25

Simplifying
x2 = 6.25

Take the square root of each side:
x = {-2.5, 2.5}