(x+3)(x-4)=60

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Solution for (x+3)(x-4)=60 equation:


Simplifying
(x + 3)(x + -4) = 60

Reorder the terms:
(3 + x)(x + -4) = 60

Reorder the terms:
(3 + x)(-4 + x) = 60

Multiply (3 + x) * (-4 + x)
(3(-4 + x) + x(-4 + x)) = 60
((-4 * 3 + x * 3) + x(-4 + x)) = 60
((-12 + 3x) + x(-4 + x)) = 60
(-12 + 3x + (-4 * x + x * x)) = 60
(-12 + 3x + (-4x + x2)) = 60

Combine like terms: 3x + -4x = -1x
(-12 + -1x + x2) = 60

Solving
-12 + -1x + x2 = 60

Solving for variable 'x'.

Reorder the terms:
-12 + -60 + -1x + x2 = 60 + -60

Combine like terms: -12 + -60 = -72
-72 + -1x + x2 = 60 + -60

Combine like terms: 60 + -60 = 0
-72 + -1x + x2 = 0

Factor a trinomial.
(-8 + -1x)(9 + -1x) = 0

Subproblem 1

Set the factor '(-8 + -1x)' equal to zero and attempt to solve: Simplifying -8 + -1x = 0 Solving -8 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + -1x = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -1x = 0 + 8 -1x = 0 + 8 Combine like terms: 0 + 8 = 8 -1x = 8 Divide each side by '-1'. x = -8 Simplifying x = -8

Subproblem 2

Set the factor '(9 + -1x)' equal to zero and attempt to solve: Simplifying 9 + -1x = 0 Solving 9 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1x = 0 + -9 -1x = 0 + -9 Combine like terms: 0 + -9 = -9 -1x = -9 Divide each side by '-1'. x = 9 Simplifying x = 9

Solution

x = {-8, 9}

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