(3a+6)(2a-5)=0

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Solution for (3a+6)(2a-5)=0 equation:


Simplifying
(3a + 6)(2a + -5) = 0

Reorder the terms:
(6 + 3a)(2a + -5) = 0

Reorder the terms:
(6 + 3a)(-5 + 2a) = 0

Multiply (6 + 3a) * (-5 + 2a)
(6(-5 + 2a) + 3a * (-5 + 2a)) = 0
((-5 * 6 + 2a * 6) + 3a * (-5 + 2a)) = 0
((-30 + 12a) + 3a * (-5 + 2a)) = 0
(-30 + 12a + (-5 * 3a + 2a * 3a)) = 0
(-30 + 12a + (-15a + 6a2)) = 0

Combine like terms: 12a + -15a = -3a
(-30 + -3a + 6a2) = 0

Solving
-30 + -3a + 6a2 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), '3'.
3(-10 + -1a + 2a2) = 0

Factor a trinomial.
3((-2 + -1a)(5 + -2a)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-2 + -1a)' equal to zero and attempt to solve: Simplifying -2 + -1a = 0 Solving -2 + -1a = 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 + -1a = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1a = 0 + 2 -1a = 0 + 2 Combine like terms: 0 + 2 = 2 -1a = 2 Divide each side by '-1'. a = -2 Simplifying a = -2

Subproblem 2

Set the factor '(5 + -2a)' equal to zero and attempt to solve: Simplifying 5 + -2a = 0 Solving 5 + -2a = 0 Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -2a = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -2a = 0 + -5 -2a = 0 + -5 Combine like terms: 0 + -5 = -5 -2a = -5 Divide each side by '-2'. a = 2.5 Simplifying a = 2.5

Solution

a = {-2, 2.5}

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