7x^2=-39x-20

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Solution for 7x^2=-39x-20 equation:


Simplifying
7x2 = -39x + -20

Reorder the terms:
7x2 = -20 + -39x

Solving
7x2 = -20 + -39x

Solving for variable 'x'.

Reorder the terms:
20 + 39x + 7x2 = -20 + -39x + 20 + 39x

Reorder the terms:
20 + 39x + 7x2 = -20 + 20 + -39x + 39x

Combine like terms: -20 + 20 = 0
20 + 39x + 7x2 = 0 + -39x + 39x
20 + 39x + 7x2 = -39x + 39x

Combine like terms: -39x + 39x = 0
20 + 39x + 7x2 = 0

Factor a trinomial.
(5 + x)(4 + 7x) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(4 + 7x)' equal to zero and attempt to solve: Simplifying 4 + 7x = 0 Solving 4 + 7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 7x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 7x = 0 + -4 7x = 0 + -4 Combine like terms: 0 + -4 = -4 7x = -4 Divide each side by '7'. x = -0.5714285714 Simplifying x = -0.5714285714

Solution

x = {-5, -0.5714285714}

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