(x+4)(3x+12)=

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Solution for (x+4)(3x+12)= equation:


Simplifying
(x + 4)(3x + 12) = 0

Reorder the terms:
(4 + x)(3x + 12) = 0

Reorder the terms:
(4 + x)(12 + 3x) = 0

Multiply (4 + x) * (12 + 3x)
(4(12 + 3x) + x(12 + 3x)) = 0
((12 * 4 + 3x * 4) + x(12 + 3x)) = 0
((48 + 12x) + x(12 + 3x)) = 0
(48 + 12x + (12 * x + 3x * x)) = 0
(48 + 12x + (12x + 3x2)) = 0

Combine like terms: 12x + 12x = 24x
(48 + 24x + 3x2) = 0

Solving
48 + 24x + 3x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(16 + 8x + x2) = 0

Factor a trinomial.
3((4 + x)(4 + x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(4 + x)' equal to zero and attempt to solve: Simplifying 4 + x = 0 Solving 4 + x = 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 + x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + x = 0 + -4 x = 0 + -4 Combine like terms: 0 + -4 = -4 x = -4 Simplifying x = -4

Subproblem 2

Set the factor '(4 + x)' equal to zero and attempt to solve: Simplifying 4 + x = 0 Solving 4 + x = 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 + x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + x = 0 + -4 x = 0 + -4 Combine like terms: 0 + -4 = -4 x = -4 Simplifying x = -4

Solution

x = {-4, -4}

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