4x^2+20x=-9

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Solution for 4x^2+20x=-9 equation:


Simplifying
4x2 + 20x = -9

Reorder the terms:
20x + 4x2 = -9

Solving
20x + 4x2 = -9

Solving for variable 'x'.

Reorder the terms:
9 + 20x + 4x2 = -9 + 9

Combine like terms: -9 + 9 = 0
9 + 20x + 4x2 = 0

Factor a trinomial.
(9 + 2x)(1 + 2x) = 0

Subproblem 1

Set the factor '(9 + 2x)' equal to zero and attempt to solve: Simplifying 9 + 2x = 0 Solving 9 + 2x = 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 + 2x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 2x = 0 + -9 2x = 0 + -9 Combine like terms: 0 + -9 = -9 2x = -9 Divide each side by '2'. x = -4.5 Simplifying x = -4.5

Subproblem 2

Set the factor '(1 + 2x)' equal to zero and attempt to solve: Simplifying 1 + 2x = 0 Solving 1 + 2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 2x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 2x = 0 + -1 2x = 0 + -1 Combine like terms: 0 + -1 = -1 2x = -1 Divide each side by '2'. x = -0.5 Simplifying x = -0.5

Solution

x = {-4.5, -0.5}

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