21a^2+4=-31a

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Solution for 21a^2+4=-31a equation:


Simplifying
21a2 + 4 = -31a

Reorder the terms:
4 + 21a2 = -31a

Solving
4 + 21a2 = -31a

Solving for variable 'a'.

Reorder the terms:
4 + 31a + 21a2 = -31a + 31a

Combine like terms: -31a + 31a = 0
4 + 31a + 21a2 = 0

Factor a trinomial.
(4 + 3a)(1 + 7a) = 0

Subproblem 1

Set the factor '(4 + 3a)' equal to zero and attempt to solve: Simplifying 4 + 3a = 0 Solving 4 + 3a = 0 Move all terms containing a to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 3a = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 3a = 0 + -4 3a = 0 + -4 Combine like terms: 0 + -4 = -4 3a = -4 Divide each side by '3'. a = -1.333333333 Simplifying a = -1.333333333

Subproblem 2

Set the factor '(1 + 7a)' equal to zero and attempt to solve: Simplifying 1 + 7a = 0 Solving 1 + 7a = 0 Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 7a = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 7a = 0 + -1 7a = 0 + -1 Combine like terms: 0 + -1 = -1 7a = -1 Divide each side by '7'. a = -0.1428571429 Simplifying a = -0.1428571429

Solution

a = {-1.333333333, -0.1428571429}

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