5x^2+28=-39x

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Solution for 5x^2+28=-39x equation:


Simplifying
5x2 + 28 = -39x

Reorder the terms:
28 + 5x2 = -39x

Solving
28 + 5x2 = -39x

Solving for variable 'x'.

Reorder the terms:
28 + 39x + 5x2 = -39x + 39x

Combine like terms: -39x + 39x = 0
28 + 39x + 5x2 = 0

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

Subproblem 1

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

Subproblem 2

Set the factor '(4 + 5x)' equal to zero and attempt to solve: Simplifying 4 + 5x = 0 Solving 4 + 5x = 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 + 5x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 5x = 0 + -4 5x = 0 + -4 Combine like terms: 0 + -4 = -4 5x = -4 Divide each side by '5'. x = -0.8 Simplifying x = -0.8

Solution

x = {-7, -0.8}

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