5a^2+15=-28a

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Solution for 5a^2+15=-28a equation:


Simplifying
5a2 + 15 = -28a

Reorder the terms:
15 + 5a2 = -28a

Solving
15 + 5a2 = -28a

Solving for variable 'a'.

Reorder the terms:
15 + 28a + 5a2 = -28a + 28a

Combine like terms: -28a + 28a = 0
15 + 28a + 5a2 = 0

Factor a trinomial.
(5 + a)(3 + 5a) = 0

Subproblem 1

Set the factor '(5 + a)' equal to zero and attempt to solve: Simplifying 5 + a = 0 Solving 5 + a = 0 Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + a = 0 + -5 Combine like terms: 5 + -5 = 0 0 + a = 0 + -5 a = 0 + -5 Combine like terms: 0 + -5 = -5 a = -5 Simplifying a = -5

Subproblem 2

Set the factor '(3 + 5a)' equal to zero and attempt to solve: Simplifying 3 + 5a = 0 Solving 3 + 5a = 0 Move all terms containing a to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 5a = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 5a = 0 + -3 5a = 0 + -3 Combine like terms: 0 + -3 = -3 5a = -3 Divide each side by '5'. a = -0.6 Simplifying a = -0.6

Solution

a = {-5, -0.6}

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