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Simplifying
2x2 + -12 + -1x2 + 4 = 20
Reorder the terms:
-12 + 4 + 2x2 + -1x2 = 20
Combine like terms: -12 + 4 = -8
-8 + 2x2 + -1x2 = 20
Combine like terms: 2x2 + -1x2 = 1x2
-8 + 1x2 = 20
Solving
-8 + 1x2 = 20
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '8' to each side of the equation.
-8 + 8 + 1x2 = 20 + 8
Combine like terms: -8 + 8 = 0
0 + 1x2 = 20 + 8
1x2 = 20 + 8
Combine like terms: 20 + 8 = 28
1x2 = 28
Divide each side by '1'.
x2 = 28
Simplifying
x2 = 28
Take the square root of each side:
x = {-5.291502622, 5.291502622}
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