5=-4x^2-9x

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Solution for 5=-4x^2-9x equation:


Simplifying
5 = -4x2 + -9x

Reorder the terms:
5 = -9x + -4x2

Solving
5 = -9x + -4x2

Solving for variable 'x'.

Reorder the terms:
5 + 9x + 4x2 = -9x + 9x + -4x2 + 4x2

Combine like terms: -9x + 9x = 0
5 + 9x + 4x2 = 0 + -4x2 + 4x2
5 + 9x + 4x2 = -4x2 + 4x2

Combine like terms: -4x2 + 4x2 = 0
5 + 9x + 4x2 = 0

Factor a trinomial.
(5 + 4x)(1 + x) = 0

Subproblem 1

Set the factor '(5 + 4x)' equal to zero and attempt to solve: Simplifying 5 + 4x = 0 Solving 5 + 4x = 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 + 4x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 4x = 0 + -5 4x = 0 + -5 Combine like terms: 0 + -5 = -5 4x = -5 Divide each side by '4'. x = -1.25 Simplifying x = -1.25

Subproblem 2

Set the factor '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 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 + x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1

Solution

x = {-1.25, -1}

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