4x^2=-15x-9

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Solution for 4x^2=-15x-9 equation:


Simplifying
4x2 = -15x + -9

Reorder the terms:
4x2 = -9 + -15x

Solving
4x2 = -9 + -15x

Solving for variable 'x'.

Reorder the terms:
9 + 15x + 4x2 = -9 + -15x + 9 + 15x

Reorder the terms:
9 + 15x + 4x2 = -9 + 9 + -15x + 15x

Combine like terms: -9 + 9 = 0
9 + 15x + 4x2 = 0 + -15x + 15x
9 + 15x + 4x2 = -15x + 15x

Combine like terms: -15x + 15x = 0
9 + 15x + 4x2 = 0

Factor a trinomial.
(3 + x)(3 + 4x) = 0

Subproblem 1

Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3

Subproblem 2

Set the factor '(3 + 4x)' equal to zero and attempt to solve: Simplifying 3 + 4x = 0 Solving 3 + 4x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 4x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 4x = 0 + -3 4x = 0 + -3 Combine like terms: 0 + -3 = -3 4x = -3 Divide each side by '4'. x = -0.75 Simplifying x = -0.75

Solution

x = {-3, -0.75}

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