28x^2-81+45=0

Solution for 28x^2-81+45=0 equation:

Simplifying
28x2 + -81 + 45 = 0

Reorder the terms:
-81 + 45 + 28x2 = 0

Combine like terms: -81 + 45 = -36
-36 + 28x2 = 0

Solving
-36 + 28x2 = 0

Solving for variable 'x'.

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

Add '36' to each side of the equation.
-36 + 36 + 28x2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + 28x2 = 0 + 36
28x2 = 0 + 36

Combine like terms: 0 + 36 = 36
28x2 = 36

Divide each side by '28'.
x2 = 1.285714286

Simplifying
x2 = 1.285714286

Take the square root of each side:
x = {-1.133893419, 1.133893419}