(x-3)(x+5)=-7

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Solution for (x-3)(x+5)=-7 equation:


Simplifying
(x + -3)(x + 5) = -7

Reorder the terms:
(-3 + x)(x + 5) = -7

Reorder the terms:
(-3 + x)(5 + x) = -7

Multiply (-3 + x) * (5 + x)
(-3(5 + x) + x(5 + x)) = -7
((5 * -3 + x * -3) + x(5 + x)) = -7
((-15 + -3x) + x(5 + x)) = -7
(-15 + -3x + (5 * x + x * x)) = -7
(-15 + -3x + (5x + x2)) = -7

Combine like terms: -3x + 5x = 2x
(-15 + 2x + x2) = -7

Solving
-15 + 2x + x2 = -7

Solving for variable 'x'.

Reorder the terms:
-15 + 7 + 2x + x2 = -7 + 7

Combine like terms: -15 + 7 = -8
-8 + 2x + x2 = -7 + 7

Combine like terms: -7 + 7 = 0
-8 + 2x + x2 = 0

Factor a trinomial.
(-4 + -1x)(2 + -1x) = 0

Subproblem 1

Set the factor '(-4 + -1x)' equal to zero and attempt to solve: Simplifying -4 + -1x = 0 Solving -4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1x = 0 + 4 -1x = 0 + 4 Combine like terms: 0 + 4 = 4 -1x = 4 Divide each side by '-1'. x = -4 Simplifying x = -4

Subproblem 2

Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 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 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2

Solution

x = {-4, 2}

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