(5+x)(x+2)=40

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Solution for (5+x)(x+2)=40 equation:


Simplifying
(5 + x)(x + 2) = 40

Reorder the terms:
(5 + x)(2 + x) = 40

Multiply (5 + x) * (2 + x)
(5(2 + x) + x(2 + x)) = 40
((2 * 5 + x * 5) + x(2 + x)) = 40
((10 + 5x) + x(2 + x)) = 40
(10 + 5x + (2 * x + x * x)) = 40
(10 + 5x + (2x + x2)) = 40

Combine like terms: 5x + 2x = 7x
(10 + 7x + x2) = 40

Solving
10 + 7x + x2 = 40

Solving for variable 'x'.

Reorder the terms:
10 + -40 + 7x + x2 = 40 + -40

Combine like terms: 10 + -40 = -30
-30 + 7x + x2 = 40 + -40

Combine like terms: 40 + -40 = 0
-30 + 7x + x2 = 0

Factor a trinomial.
(-10 + -1x)(3 + -1x) = 0

Subproblem 1

Set the factor '(-10 + -1x)' equal to zero and attempt to solve: Simplifying -10 + -1x = 0 Solving -10 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + -1x = 0 + 10 Combine like terms: -10 + 10 = 0 0 + -1x = 0 + 10 -1x = 0 + 10 Combine like terms: 0 + 10 = 10 -1x = 10 Divide each side by '-1'. x = -10 Simplifying x = -10

Subproblem 2

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 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 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Solution

x = {-10, 3}

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