26x^2-56+21=0

Solution for 26x^2-56+21=0 equation:

Simplifying
26x2 + -56 + 21 = 0

Reorder the terms:
-56 + 21 + 26x2 = 0

Combine like terms: -56 + 21 = -35
-35 + 26x2 = 0

Solving
-35 + 26x2 = 0

Solving for variable 'x'.

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

Add '35' to each side of the equation.
-35 + 35 + 26x2 = 0 + 35

Combine like terms: -35 + 35 = 0
0 + 26x2 = 0 + 35
26x2 = 0 + 35

Combine like terms: 0 + 35 = 35
26x2 = 35

Divide each side by '26'.
x2 = 1.346153846

Simplifying
x2 = 1.346153846

Take the square root of each side:
x = {-1.160238702, 1.160238702}