5(3a-6)5a=-12+a

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Solution for 5(3a-6)5a=-12+a equation:


Simplifying
5(3a + -6) * 5a = -12 + a

Reorder the terms:
5(-6 + 3a) * 5a = -12 + a

Reorder the terms for easier multiplication:
5 * 5a(-6 + 3a) = -12 + a

Multiply 5 * 5
25a(-6 + 3a) = -12 + a
(-6 * 25a + 3a * 25a) = -12 + a
(-150a + 75a2) = -12 + a

Solving
-150a + 75a2 = -12 + a

Solving for variable 'a'.

Reorder the terms:
12 + -150a + -1a + 75a2 = -12 + a + 12 + -1a

Combine like terms: -150a + -1a = -151a
12 + -151a + 75a2 = -12 + a + 12 + -1a

Reorder the terms:
12 + -151a + 75a2 = -12 + 12 + a + -1a

Combine like terms: -12 + 12 = 0
12 + -151a + 75a2 = 0 + a + -1a
12 + -151a + 75a2 = a + -1a

Combine like terms: a + -1a = 0
12 + -151a + 75a2 = 0

Begin completing the square.  Divide all terms by
75 the coefficient of the squared term: 

Divide each side by '75'.
0.16 + -2.013333333a + a2 = 0

Move the constant term to the right:

Add '-0.16' to each side of the equation.
0.16 + -2.013333333a + -0.16 + a2 = 0 + -0.16

Reorder the terms:
0.16 + -0.16 + -2.013333333a + a2 = 0 + -0.16

Combine like terms: 0.16 + -0.16 = 0.00
0.00 + -2.013333333a + a2 = 0 + -0.16
-2.013333333a + a2 = 0 + -0.16

Combine like terms: 0 + -0.16 = -0.16
-2.013333333a + a2 = -0.16

The a term is -2.013333333a.  Take half its coefficient (-1.006666667).
Square it (1.013377778) and add it to both sides.

Add '1.013377778' to each side of the equation.
-2.013333333a + 1.013377778 + a2 = -0.16 + 1.013377778

Reorder the terms:
1.013377778 + -2.013333333a + a2 = -0.16 + 1.013377778

Combine like terms: -0.16 + 1.013377778 = 0.853377778
1.013377778 + -2.013333333a + a2 = 0.853377778

Factor a perfect square on the left side:
(a + -1.006666667)(a + -1.006666667) = 0.853377778

Calculate the square root of the right side: 0.923784487

Break this problem into two subproblems by setting 
(a + -1.006666667) equal to 0.923784487 and -0.923784487.

Subproblem 1

a + -1.006666667 = 0.923784487 Simplifying a + -1.006666667 = 0.923784487 Reorder the terms: -1.006666667 + a = 0.923784487 Solving -1.006666667 + a = 0.923784487 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1.006666667' to each side of the equation. -1.006666667 + 1.006666667 + a = 0.923784487 + 1.006666667 Combine like terms: -1.006666667 + 1.006666667 = 0.000000000 0.000000000 + a = 0.923784487 + 1.006666667 a = 0.923784487 + 1.006666667 Combine like terms: 0.923784487 + 1.006666667 = 1.930451154 a = 1.930451154 Simplifying a = 1.930451154

Subproblem 2

a + -1.006666667 = -0.923784487 Simplifying a + -1.006666667 = -0.923784487 Reorder the terms: -1.006666667 + a = -0.923784487 Solving -1.006666667 + a = -0.923784487 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1.006666667' to each side of the equation. -1.006666667 + 1.006666667 + a = -0.923784487 + 1.006666667 Combine like terms: -1.006666667 + 1.006666667 = 0.000000000 0.000000000 + a = -0.923784487 + 1.006666667 a = -0.923784487 + 1.006666667 Combine like terms: -0.923784487 + 1.006666667 = 0.08288218 a = 0.08288218 Simplifying a = 0.08288218

Solution

The solution to the problem is based on the solutions from the subproblems. a = {1.930451154, 0.08288218}

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