(x-5)(x+3)=9

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Solution for (x-5)(x+3)=9 equation:


Simplifying
(x + -5)(x + 3) = 9

Reorder the terms:
(-5 + x)(x + 3) = 9

Reorder the terms:
(-5 + x)(3 + x) = 9

Multiply (-5 + x) * (3 + x)
(-5(3 + x) + x(3 + x)) = 9
((3 * -5 + x * -5) + x(3 + x)) = 9
((-15 + -5x) + x(3 + x)) = 9
(-15 + -5x + (3 * x + x * x)) = 9
(-15 + -5x + (3x + x2)) = 9

Combine like terms: -5x + 3x = -2x
(-15 + -2x + x2) = 9

Solving
-15 + -2x + x2 = 9

Solving for variable 'x'.

Reorder the terms:
-15 + -9 + -2x + x2 = 9 + -9

Combine like terms: -15 + -9 = -24
-24 + -2x + x2 = 9 + -9

Combine like terms: 9 + -9 = 0
-24 + -2x + x2 = 0

Factor a trinomial.
(-4 + -1x)(6 + -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 '(6 + -1x)' equal to zero and attempt to solve: Simplifying 6 + -1x = 0 Solving 6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -1x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1x = 0 + -6 -1x = 0 + -6 Combine like terms: 0 + -6 = -6 -1x = -6 Divide each side by '-1'. x = 6 Simplifying x = 6

Solution

x = {-4, 6}

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