-8*X^2+13=4

Solution for -8*X^2+13=4 equation:

Simplifying
-8X2 + 13 = 4

Reorder the terms:
13 + -8X2 = 4

Solving
13 + -8X2 = 4

Solving for variable 'X'.

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

Add '-13' to each side of the equation.
13 + -13 + -8X2 = 4 + -13

Combine like terms: 13 + -13 = 0
0 + -8X2 = 4 + -13
-8X2 = 4 + -13

Combine like terms: 4 + -13 = -9
-8X2 = -9

Divide each side by '-8'.
X2 = 1.125

Simplifying
X2 = 1.125

Take the square root of each side:
X = {-1.060660172, 1.060660172}