100=(120+x^2)-(200+11x)

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Solution for 100=(120+x^2)-(200+11x) equation:


Simplifying
100 = (120 + x2) + -1(200 + 11x)

Remove parenthesis around (120 + x2)
100 = 120 + x2 + -1(200 + 11x)
100 = 120 + x2 + (200 * -1 + 11x * -1)
100 = 120 + x2 + (-200 + -11x)

Reorder the terms:
100 = 120 + -200 + -11x + x2

Combine like terms: 120 + -200 = -80
100 = -80 + -11x + x2

Solving
100 = -80 + -11x + x2

Solving for variable 'x'.

Combine like terms: 100 + 80 = 180
180 + 11x + -1x2 = -80 + -11x + x2 + 80 + 11x + -1x2

Reorder the terms:
180 + 11x + -1x2 = -80 + 80 + -11x + 11x + x2 + -1x2

Combine like terms: -80 + 80 = 0
180 + 11x + -1x2 = 0 + -11x + 11x + x2 + -1x2
180 + 11x + -1x2 = -11x + 11x + x2 + -1x2

Combine like terms: -11x + 11x = 0
180 + 11x + -1x2 = 0 + x2 + -1x2
180 + 11x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
180 + 11x + -1x2 = 0

Factor a trinomial.
(20 + -1x)(9 + x) = 0

Subproblem 1

Set the factor '(20 + -1x)' equal to zero and attempt to solve: Simplifying 20 + -1x = 0 Solving 20 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + -1x = 0 + -20 Combine like terms: 20 + -20 = 0 0 + -1x = 0 + -20 -1x = 0 + -20 Combine like terms: 0 + -20 = -20 -1x = -20 Divide each side by '-1'. x = 20 Simplifying x = 20

Subproblem 2

Set the factor '(9 + x)' equal to zero and attempt to solve: Simplifying 9 + x = 0 Solving 9 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + x = 0 + -9 x = 0 + -9 Combine like terms: 0 + -9 = -9 x = -9 Simplifying x = -9

Solution

x = {20, -9}

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