7a^2=-84-56a

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Solution for 7a^2=-84-56a equation:


Simplifying
7a2 = -84 + -56a

Solving
7a2 = -84 + -56a

Solving for variable 'a'.

Reorder the terms:
84 + 56a + 7a2 = -84 + -56a + 84 + 56a

Reorder the terms:
84 + 56a + 7a2 = -84 + 84 + -56a + 56a

Combine like terms: -84 + 84 = 0
84 + 56a + 7a2 = 0 + -56a + 56a
84 + 56a + 7a2 = -56a + 56a

Combine like terms: -56a + 56a = 0
84 + 56a + 7a2 = 0

Factor out the Greatest Common Factor (GCF), '7'.
7(12 + 8a + a2) = 0

Factor a trinomial.
7((6 + a)(2 + a)) = 0

Ignore the factor 7.

Subproblem 1

Set the factor '(6 + a)' equal to zero and attempt to solve: Simplifying 6 + a = 0 Solving 6 + a = 0 Move all terms containing a to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + a = 0 + -6 Combine like terms: 6 + -6 = 0 0 + a = 0 + -6 a = 0 + -6 Combine like terms: 0 + -6 = -6 a = -6 Simplifying a = -6

Subproblem 2

Set the factor '(2 + a)' equal to zero and attempt to solve: Simplifying 2 + a = 0 Solving 2 + a = 0 Move all terms containing a to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + a = 0 + -2 Combine like terms: 2 + -2 = 0 0 + a = 0 + -2 a = 0 + -2 Combine like terms: 0 + -2 = -2 a = -2 Simplifying a = -2

Solution

a = {-6, -2}

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