3=x^2+13x+39

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Solution for 3=x^2+13x+39 equation:


Simplifying
3 = x2 + 13x + 39

Reorder the terms:
3 = 39 + 13x + x2

Solving
3 = 39 + 13x + x2

Solving for variable 'x'.

Combine like terms: 3 + -39 = -36
-36 + -13x + -1x2 = 39 + 13x + x2 + -39 + -13x + -1x2

Reorder the terms:
-36 + -13x + -1x2 = 39 + -39 + 13x + -13x + x2 + -1x2

Combine like terms: 39 + -39 = 0
-36 + -13x + -1x2 = 0 + 13x + -13x + x2 + -1x2
-36 + -13x + -1x2 = 13x + -13x + x2 + -1x2

Combine like terms: 13x + -13x = 0
-36 + -13x + -1x2 = 0 + x2 + -1x2
-36 + -13x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-36 + -13x + -1x2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(36 + 13x + x2) = 0

Factor a trinomial.
-1((9 + x)(4 + x)) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(9 + x)' equal to zero and attempt to solve: Simplifying 9 + x = 0 Solving 9 + x = 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 + x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + x = 0 + -9 x = 0 + -9 Combine like terms: 0 + -9 = -9 x = -9 Simplifying x = -9

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 = {-9, -4}

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