21a^2=-65a-24

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Solution for 21a^2=-65a-24 equation:


Simplifying
21a2 = -65a + -24

Reorder the terms:
21a2 = -24 + -65a

Solving
21a2 = -24 + -65a

Solving for variable 'a'.

Reorder the terms:
24 + 65a + 21a2 = -24 + -65a + 24 + 65a

Reorder the terms:
24 + 65a + 21a2 = -24 + 24 + -65a + 65a

Combine like terms: -24 + 24 = 0
24 + 65a + 21a2 = 0 + -65a + 65a
24 + 65a + 21a2 = -65a + 65a

Combine like terms: -65a + 65a = 0
24 + 65a + 21a2 = 0

Factor a trinomial.
(8 + 3a)(3 + 7a) = 0

Subproblem 1

Set the factor '(8 + 3a)' equal to zero and attempt to solve: Simplifying 8 + 3a = 0 Solving 8 + 3a = 0 Move all terms containing a to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + 3a = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 3a = 0 + -8 3a = 0 + -8 Combine like terms: 0 + -8 = -8 3a = -8 Divide each side by '3'. a = -2.666666667 Simplifying a = -2.666666667

Subproblem 2

Set the factor '(3 + 7a)' equal to zero and attempt to solve: Simplifying 3 + 7a = 0 Solving 3 + 7a = 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 + 7a = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 7a = 0 + -3 7a = 0 + -3 Combine like terms: 0 + -3 = -3 7a = -3 Divide each side by '7'. a = -0.4285714286 Simplifying a = -0.4285714286

Solution

a = {-2.666666667, -0.4285714286}

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