(x-1)(5+x)=40

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Solution for (x-1)(5+x)=40 equation:


Simplifying
(x + -1)(5 + x) = 40

Reorder the terms:
(-1 + x)(5 + x) = 40

Multiply (-1 + x) * (5 + x)
(-1(5 + x) + x(5 + x)) = 40
((5 * -1 + x * -1) + x(5 + x)) = 40
((-5 + -1x) + x(5 + x)) = 40
(-5 + -1x + (5 * x + x * x)) = 40
(-5 + -1x + (5x + x2)) = 40

Combine like terms: -1x + 5x = 4x
(-5 + 4x + x2) = 40

Solving
-5 + 4x + x2 = 40

Solving for variable 'x'.

Reorder the terms:
-5 + -40 + 4x + x2 = 40 + -40

Combine like terms: -5 + -40 = -45
-45 + 4x + x2 = 40 + -40

Combine like terms: 40 + -40 = 0
-45 + 4x + x2 = 0

Factor a trinomial.
(-9 + -1x)(5 + -1x) = 0

Subproblem 1

Set the factor '(-9 + -1x)' equal to zero and attempt to solve: Simplifying -9 + -1x = 0 Solving -9 + -1x = 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 + -1x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -1x = 0 + 9 -1x = 0 + 9 Combine like terms: 0 + 9 = 9 -1x = 9 Divide each side by '-1'. x = -9 Simplifying x = -9

Subproblem 2

Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5

Solution

x = {-9, 5}

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