15a^2=-66a+45

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Solution for 15a^2=-66a+45 equation:


Simplifying
15a2 = -66a + 45

Reorder the terms:
15a2 = 45 + -66a

Solving
15a2 = 45 + -66a

Solving for variable 'a'.

Reorder the terms:
-45 + 66a + 15a2 = 45 + -66a + -45 + 66a

Reorder the terms:
-45 + 66a + 15a2 = 45 + -45 + -66a + 66a

Combine like terms: 45 + -45 = 0
-45 + 66a + 15a2 = 0 + -66a + 66a
-45 + 66a + 15a2 = -66a + 66a

Combine like terms: -66a + 66a = 0
-45 + 66a + 15a2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-15 + 22a + 5a2) = 0

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

Ignore the factor 3.

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 '(3 + -5a)' equal to zero and attempt to solve: Simplifying 3 + -5a = 0 Solving 3 + -5a = 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 + -5a = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -5a = 0 + -3 -5a = 0 + -3 Combine like terms: 0 + -3 = -3 -5a = -3 Divide each side by '-5'. a = 0.6 Simplifying a = 0.6

Solution

a = {-5, 0.6}

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