3(a+5)-2a(8-3a)=

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Solution for 3(a+5)-2a(8-3a)= equation:


Simplifying
3(a + 5) + -2a(8 + -3a) = 0

Reorder the terms:
3(5 + a) + -2a(8 + -3a) = 0
(5 * 3 + a * 3) + -2a(8 + -3a) = 0
(15 + 3a) + -2a(8 + -3a) = 0
15 + 3a + (8 * -2a + -3a * -2a) = 0
15 + 3a + (-16a + 6a2) = 0

Combine like terms: 3a + -16a = -13a
15 + -13a + 6a2 = 0

Solving
15 + -13a + 6a2 = 0

Solving for variable 'a'.

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

Divide each side by '6'.
2.5 + -2.166666667a + a2 = 0

Move the constant term to the right:

Add '-2.5' to each side of the equation.
2.5 + -2.166666667a + -2.5 + a2 = 0 + -2.5

Reorder the terms:
2.5 + -2.5 + -2.166666667a + a2 = 0 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + -2.166666667a + a2 = 0 + -2.5
-2.166666667a + a2 = 0 + -2.5

Combine like terms: 0 + -2.5 = -2.5
-2.166666667a + a2 = -2.5

The a term is -2.166666667a.  Take half its coefficient (-1.083333334).
Square it (1.173611113) and add it to both sides.

Add '1.173611113' to each side of the equation.
-2.166666667a + 1.173611113 + a2 = -2.5 + 1.173611113

Reorder the terms:
1.173611113 + -2.166666667a + a2 = -2.5 + 1.173611113

Combine like terms: -2.5 + 1.173611113 = -1.326388887
1.173611113 + -2.166666667a + a2 = -1.326388887

Factor a perfect square on the left side:
(a + -1.083333334)(a + -1.083333334) = -1.326388887

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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