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Simplifying
8x2 + -13 = 1139
Reorder the terms:
-13 + 8x2 = 1139
Solving
-13 + 8x2 = 1139
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '13' to each side of the equation.
-13 + 13 + 8x2 = 1139 + 13
Combine like terms: -13 + 13 = 0
0 + 8x2 = 1139 + 13
8x2 = 1139 + 13
Combine like terms: 1139 + 13 = 1152
8x2 = 1152
Divide each side by '8'.
x2 = 144
Simplifying
x2 = 144
Take the square root of each side:
x = {-12, 12}
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