(x-2)(x+7)+20=0

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Solution for (x-2)(x+7)+20=0 equation:


Simplifying
(x + -2)(x + 7) + 20 = 0

Reorder the terms:
(-2 + x)(x + 7) + 20 = 0

Reorder the terms:
(-2 + x)(7 + x) + 20 = 0

Multiply (-2 + x) * (7 + x)
(-2(7 + x) + x(7 + x)) + 20 = 0
((7 * -2 + x * -2) + x(7 + x)) + 20 = 0
((-14 + -2x) + x(7 + x)) + 20 = 0
(-14 + -2x + (7 * x + x * x)) + 20 = 0
(-14 + -2x + (7x + x2)) + 20 = 0

Combine like terms: -2x + 7x = 5x
(-14 + 5x + x2) + 20 = 0

Reorder the terms:
-14 + 20 + 5x + x2 = 0

Combine like terms: -14 + 20 = 6
6 + 5x + x2 = 0

Solving
6 + 5x + x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(3 + x)(2 + x) = 0

Subproblem 1

Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3

Subproblem 2

Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2

Solution

x = {-3, -2}

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