=4x^2+28x+40

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Solution for =4x^2+28x+40 equation:


Simplifying
0 = 4x2 + 28x + 40

Reorder the terms:
0 = 40 + 28x + 4x2

Solving
0 = 40 + 28x + 4x2

Solving for variable 'x'.

Combine like terms: 0 + -40 = -40
-40 + -28x + -4x2 = 40 + 28x + 4x2 + -40 + -28x + -4x2

Reorder the terms:
-40 + -28x + -4x2 = 40 + -40 + 28x + -28x + 4x2 + -4x2

Combine like terms: 40 + -40 = 0
-40 + -28x + -4x2 = 0 + 28x + -28x + 4x2 + -4x2
-40 + -28x + -4x2 = 28x + -28x + 4x2 + -4x2

Combine like terms: 28x + -28x = 0
-40 + -28x + -4x2 = 0 + 4x2 + -4x2
-40 + -28x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-40 + -28x + -4x2 = 0

Factor out the Greatest Common Factor (GCF), '-4'.
-4(10 + 7x + x2) = 0

Factor a trinomial.
-4((5 + x)(2 + x)) = 0

Ignore the factor -4.

Subproblem 1

Set the factor '(5 + x)' equal to zero and attempt to solve: Simplifying 5 + x = 0 Solving 5 + x = 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 + x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + x = 0 + -5 x = 0 + -5 Combine like terms: 0 + -5 = -5 x = -5 Simplifying x = -5

Subproblem 2

Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2

Solution

x = {-5, -2}

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