(a+5)(3a-4)=0

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Solution for (a+5)(3a-4)=0 equation:


Simplifying
(a + 5)(3a + -4) = 0

Reorder the terms:
(5 + a)(3a + -4) = 0

Reorder the terms:
(5 + a)(-4 + 3a) = 0

Multiply (5 + a) * (-4 + 3a)
(5(-4 + 3a) + a(-4 + 3a)) = 0
((-4 * 5 + 3a * 5) + a(-4 + 3a)) = 0
((-20 + 15a) + a(-4 + 3a)) = 0
(-20 + 15a + (-4 * a + 3a * a)) = 0
(-20 + 15a + (-4a + 3a2)) = 0

Combine like terms: 15a + -4a = 11a
(-20 + 11a + 3a2) = 0

Solving
-20 + 11a + 3a2 = 0

Solving for variable 'a'.

Factor a trinomial.
(-5 + -1a)(4 + -3a) = 0

Subproblem 1

Set the factor '(-5 + -1a)' equal to zero and attempt to solve: Simplifying -5 + -1a = 0 Solving -5 + -1a = 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 + -1a = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1a = 0 + 5 -1a = 0 + 5 Combine like terms: 0 + 5 = 5 -1a = 5 Divide each side by '-1'. a = -5 Simplifying a = -5

Subproblem 2

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

Solution

a = {-5, 1.333333333}

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