3a^2+4a=2a^2+-2a+-9

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Solution for 3a^2+4a=2a^2+-2a+-9 equation:


Simplifying
3a2 + 4a = 2a2 + -2a + -9

Reorder the terms:
4a + 3a2 = 2a2 + -2a + -9

Reorder the terms:
4a + 3a2 = -9 + -2a + 2a2

Solving
4a + 3a2 = -9 + -2a + 2a2

Solving for variable 'a'.

Reorder the terms:
9 + 4a + 2a + 3a2 + -2a2 = -9 + -2a + 2a2 + 9 + 2a + -2a2

Combine like terms: 4a + 2a = 6a
9 + 6a + 3a2 + -2a2 = -9 + -2a + 2a2 + 9 + 2a + -2a2

Combine like terms: 3a2 + -2a2 = 1a2
9 + 6a + 1a2 = -9 + -2a + 2a2 + 9 + 2a + -2a2

Reorder the terms:
9 + 6a + 1a2 = -9 + 9 + -2a + 2a + 2a2 + -2a2

Combine like terms: -9 + 9 = 0
9 + 6a + 1a2 = 0 + -2a + 2a + 2a2 + -2a2
9 + 6a + 1a2 = -2a + 2a + 2a2 + -2a2

Combine like terms: -2a + 2a = 0
9 + 6a + 1a2 = 0 + 2a2 + -2a2
9 + 6a + 1a2 = 2a2 + -2a2

Combine like terms: 2a2 + -2a2 = 0
9 + 6a + 1a2 = 0

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

Subproblem 1

Set the factor '(3 + a)' equal to zero and attempt to solve: Simplifying 3 + a = 0 Solving 3 + a = 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 + a = 0 + -3 Combine like terms: 3 + -3 = 0 0 + a = 0 + -3 a = 0 + -3 Combine like terms: 0 + -3 = -3 a = -3 Simplifying a = -3

Subproblem 2

Set the factor '(3 + a)' equal to zero and attempt to solve: Simplifying 3 + a = 0 Solving 3 + a = 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 + a = 0 + -3 Combine like terms: 3 + -3 = 0 0 + a = 0 + -3 a = 0 + -3 Combine like terms: 0 + -3 = -3 a = -3 Simplifying a = -3

Solution

a = {-3, -3}

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