0=4x^2+28x

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Solution for 0=4x^2+28x equation:


Simplifying
0 = 4x2 + 28x

Reorder the terms:
0 = 28x + 4x2

Solving
0 = 28x + 4x2

Solving for variable 'x'.
Remove the zero:
-28x + -4x2 = 28x + 4x2 + -28x + -4x2

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

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

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

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

Ignore the factor -4.

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(7 + x)' equal to zero and attempt to solve: Simplifying 7 + x = 0 Solving 7 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + x = 0 + -7 x = 0 + -7 Combine like terms: 0 + -7 = -7 x = -7 Simplifying x = -7

Solution

x = {0, -7}

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