(x+5)(x-1)=280

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Solution for (x+5)(x-1)=280 equation:


Simplifying
(x + 5)(x + -1) = 280

Reorder the terms:
(5 + x)(x + -1) = 280

Reorder the terms:
(5 + x)(-1 + x) = 280

Multiply (5 + x) * (-1 + x)
(5(-1 + x) + x(-1 + x)) = 280
((-1 * 5 + x * 5) + x(-1 + x)) = 280
((-5 + 5x) + x(-1 + x)) = 280
(-5 + 5x + (-1 * x + x * x)) = 280
(-5 + 5x + (-1x + x2)) = 280

Combine like terms: 5x + -1x = 4x
(-5 + 4x + x2) = 280

Solving
-5 + 4x + x2 = 280

Solving for variable 'x'.

Reorder the terms:
-5 + -280 + 4x + x2 = 280 + -280

Combine like terms: -5 + -280 = -285
-285 + 4x + x2 = 280 + -280

Combine like terms: 280 + -280 = 0
-285 + 4x + x2 = 0

Factor a trinomial.
(-19 + -1x)(15 + -1x) = 0

Subproblem 1

Set the factor '(-19 + -1x)' equal to zero and attempt to solve: Simplifying -19 + -1x = 0 Solving -19 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '19' to each side of the equation. -19 + 19 + -1x = 0 + 19 Combine like terms: -19 + 19 = 0 0 + -1x = 0 + 19 -1x = 0 + 19 Combine like terms: 0 + 19 = 19 -1x = 19 Divide each side by '-1'. x = -19 Simplifying x = -19

Subproblem 2

Set the factor '(15 + -1x)' equal to zero and attempt to solve: Simplifying 15 + -1x = 0 Solving 15 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + -1x = 0 + -15 Combine like terms: 15 + -15 = 0 0 + -1x = 0 + -15 -1x = 0 + -15 Combine like terms: 0 + -15 = -15 -1x = -15 Divide each side by '-1'. x = 15 Simplifying x = 15

Solution

x = {-19, 15}

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