(x-4)(x+3)=8

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Solution for (x-4)(x+3)=8 equation:


Simplifying
(x + -4)(x + 3) = 8

Reorder the terms:
(-4 + x)(x + 3) = 8

Reorder the terms:
(-4 + x)(3 + x) = 8

Multiply (-4 + x) * (3 + x)
(-4(3 + x) + x(3 + x)) = 8
((3 * -4 + x * -4) + x(3 + x)) = 8
((-12 + -4x) + x(3 + x)) = 8
(-12 + -4x + (3 * x + x * x)) = 8
(-12 + -4x + (3x + x2)) = 8

Combine like terms: -4x + 3x = -1x
(-12 + -1x + x2) = 8

Solving
-12 + -1x + x2 = 8

Solving for variable 'x'.

Reorder the terms:
-12 + -8 + -1x + x2 = 8 + -8

Combine like terms: -12 + -8 = -20
-20 + -1x + x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-20 + -1x + x2 = 0

Factor a trinomial.
(-4 + -1x)(5 + -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 '(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 = {-4, 5}

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