-4x^2+8+1=0

Solution for -4x^2+8+1=0 equation:

Simplifying
-4x2 + 8 + 1 = 0

Reorder the terms:
8 + 1 + -4x2 = 0

Combine like terms: 8 + 1 = 9
9 + -4x2 = 0

Solving
9 + -4x2 = 0

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 + -4x2 = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -4x2 = 0 + -9
-4x2 = 0 + -9

Combine like terms: 0 + -9 = -9
-4x2 = -9

Divide each side by '-4'.
x2 = 2.25

Simplifying
x2 = 2.25

Take the square root of each side:
x = {-1.5, 1.5}