4a^2-8a-16=-2a^2+5a+12

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Solution for 4a^2-8a-16=-2a^2+5a+12 equation:


Simplifying
4a2 + -8a + -16 = -2a2 + 5a + 12

Reorder the terms:
-16 + -8a + 4a2 = -2a2 + 5a + 12

Reorder the terms:
-16 + -8a + 4a2 = 12 + 5a + -2a2

Solving
-16 + -8a + 4a2 = 12 + 5a + -2a2

Solving for variable 'a'.

Reorder the terms:
-16 + -12 + -8a + -5a + 4a2 + 2a2 = 12 + 5a + -2a2 + -12 + -5a + 2a2

Combine like terms: -16 + -12 = -28
-28 + -8a + -5a + 4a2 + 2a2 = 12 + 5a + -2a2 + -12 + -5a + 2a2

Combine like terms: -8a + -5a = -13a
-28 + -13a + 4a2 + 2a2 = 12 + 5a + -2a2 + -12 + -5a + 2a2

Combine like terms: 4a2 + 2a2 = 6a2
-28 + -13a + 6a2 = 12 + 5a + -2a2 + -12 + -5a + 2a2

Reorder the terms:
-28 + -13a + 6a2 = 12 + -12 + 5a + -5a + -2a2 + 2a2

Combine like terms: 12 + -12 = 0
-28 + -13a + 6a2 = 0 + 5a + -5a + -2a2 + 2a2
-28 + -13a + 6a2 = 5a + -5a + -2a2 + 2a2

Combine like terms: 5a + -5a = 0
-28 + -13a + 6a2 = 0 + -2a2 + 2a2
-28 + -13a + 6a2 = -2a2 + 2a2

Combine like terms: -2a2 + 2a2 = 0
-28 + -13a + 6a2 = 0

Factor a trinomial.
(-4 + -3a)(7 + -2a) = 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 '(7 + -2a)' equal to zero and attempt to solve: Simplifying 7 + -2a = 0 Solving 7 + -2a = 0 Move all terms containing a to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -2a = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -2a = 0 + -7 -2a = 0 + -7 Combine like terms: 0 + -7 = -7 -2a = -7 Divide each side by '-2'. a = 3.5 Simplifying a = 3.5

Solution

a = {-1.333333333, 3.5}

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