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Simplifying
4x2 + 26 = 90
Reorder the terms:
26 + 4x2 = 90
Solving
26 + 4x2 = 90
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-26' to each side of the equation.
26 + -26 + 4x2 = 90 + -26
Combine like terms: 26 + -26 = 0
0 + 4x2 = 90 + -26
4x2 = 90 + -26
Combine like terms: 90 + -26 = 64
4x2 = 64
Divide each side by '4'.
x2 = 16
Simplifying
x2 = 16
Take the square root of each side:
x = {-4, 4}
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