8x^2-21-3=

Solution for 8x^2-21-3= equation:

Simplifying
8x2 + -21 + -3 = 0

Reorder the terms:
-21 + -3 + 8x2 = 0

Combine like terms: -21 + -3 = -24
-24 + 8x2 = 0

Solving
-24 + 8x2 = 0

Solving for variable 'x'.

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

Add '24' to each side of the equation.
-24 + 24 + 8x2 = 0 + 24

Combine like terms: -24 + 24 = 0
0 + 8x2 = 0 + 24
8x2 = 0 + 24

Combine like terms: 0 + 24 = 24
8x2 = 24

Divide each side by '8'.
x2 = 3

Simplifying
x2 = 3

Take the square root of each side:
x = {-1.732050808, 1.732050808}