5x^2+21x=-4x

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Solution for 5x^2+21x=-4x equation:


Simplifying
5x2 + 21x = -4x

Reorder the terms:
21x + 5x2 = -4x

Solving
21x + 5x2 = -4x

Solving for variable 'x'.

Reorder the terms:
21x + 4x + 5x2 = -4x + 4x

Combine like terms: 21x + 4x = 25x
25x + 5x2 = -4x + 4x

Combine like terms: -4x + 4x = 0
25x + 5x2 = 0

Factor out the Greatest Common Factor (GCF), '5x'.
5x(5 + x) = 0

Ignore the factor 5.

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 '(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

Solution

x = {0, -5}

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