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Simplifying
(x + 7) + (-12x2 + -1x + -2) = 0
Reorder the terms:
(7 + x) + (-12x2 + -1x + -2) = 0
Remove parenthesis around (7 + x)
7 + x + (-12x2 + -1x + -2) = 0
Reorder the terms:
7 + x + (-2 + -1x + -12x2) = 0
Remove parenthesis around (-2 + -1x + -12x2)
7 + x + -2 + -1x + -12x2 = 0
Reorder the terms:
7 + -2 + x + -1x + -12x2 = 0
Combine like terms: 7 + -2 = 5
5 + x + -1x + -12x2 = 0
Combine like terms: x + -1x = 0
5 + 0 + -12x2 = 0
5 + -12x2 = 0
Solving
5 + -12x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-5' to each side of the equation.
5 + -5 + -12x2 = 0 + -5
Combine like terms: 5 + -5 = 0
0 + -12x2 = 0 + -5
-12x2 = 0 + -5
Combine like terms: 0 + -5 = -5
-12x2 = -5
Divide each side by '-12'.
x2 = 0.4166666667
Simplifying
x2 = 0.4166666667
Take the square root of each side:
x = {-0.645497224, 0.645497224}
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