X^2-21.75+15.75=0

Solution for X^2-21.75+15.75=0 equation:

Simplifying
X2 + -21.75 + 15.75 = 0

Reorder the terms:
-21.75 + 15.75 + X2 = 0

Combine like terms: -21.75 + 15.75 = -6
-6 + X2 = 0

Solving
-6 + X2 = 0

Solving for variable 'X'.

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

Add '6' to each side of the equation.
-6 + 6 + X2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + X2 = 0 + 6
X2 = 0 + 6

Combine like terms: 0 + 6 = 6
X2 = 6

Simplifying
X2 = 6

Take the square root of each side:
X = {-2.449489743, 2.449489743}