15(2a-2)=5(a^2-1)

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Solution for 15(2a-2)=5(a^2-1) equation:


Simplifying
15(2a + -2) = 5(a2 + -1)

Reorder the terms:
15(-2 + 2a) = 5(a2 + -1)
(-2 * 15 + 2a * 15) = 5(a2 + -1)
(-30 + 30a) = 5(a2 + -1)

Reorder the terms:
-30 + 30a = 5(-1 + a2)
-30 + 30a = (-1 * 5 + a2 * 5)
-30 + 30a = (-5 + 5a2)

Solving
-30 + 30a = -5 + 5a2

Solving for variable 'a'.

Reorder the terms:
-30 + 5 + 30a + -5a2 = -5 + 5a2 + 5 + -5a2

Combine like terms: -30 + 5 = -25
-25 + 30a + -5a2 = -5 + 5a2 + 5 + -5a2

Reorder the terms:
-25 + 30a + -5a2 = -5 + 5 + 5a2 + -5a2

Combine like terms: -5 + 5 = 0
-25 + 30a + -5a2 = 0 + 5a2 + -5a2
-25 + 30a + -5a2 = 5a2 + -5a2

Combine like terms: 5a2 + -5a2 = 0
-25 + 30a + -5a2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-5 + 6a + -1a2) = 0

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

Ignore the factor 5.

Subproblem 1

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

Subproblem 2

Set the factor '(1 + -1a)' equal to zero and attempt to solve: Simplifying 1 + -1a = 0 Solving 1 + -1a = 0 Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -1a = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1a = 0 + -1 -1a = 0 + -1 Combine like terms: 0 + -1 = -1 -1a = -1 Divide each side by '-1'. a = 1 Simplifying a = 1

Solution

a = {5, 1}

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