10a+5a(a-3)=-12

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Solution for 10a+5a(a-3)=-12 equation:


Simplifying
10a + 5a(a + -3) = -12

Reorder the terms:
10a + 5a(-3 + a) = -12
10a + (-3 * 5a + a * 5a) = -12
10a + (-15a + 5a2) = -12

Combine like terms: 10a + -15a = -5a
-5a + 5a2 = -12

Solving
-5a + 5a2 = -12

Solving for variable 'a'.

Reorder the terms:
12 + -5a + 5a2 = -12 + 12

Combine like terms: -12 + 12 = 0
12 + -5a + 5a2 = 0

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

Divide each side by '5'.
2.4 + -1a + a2 = 0

Move the constant term to the right:

Add '-2.4' to each side of the equation.
2.4 + -1a + -2.4 + a2 = 0 + -2.4

Reorder the terms:
2.4 + -2.4 + -1a + a2 = 0 + -2.4

Combine like terms: 2.4 + -2.4 = 0.0
0.0 + -1a + a2 = 0 + -2.4
-1a + a2 = 0 + -2.4

Combine like terms: 0 + -2.4 = -2.4
-1a + a2 = -2.4

The a term is -1a.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1a + 0.25 + a2 = -2.4 + 0.25

Reorder the terms:
0.25 + -1a + a2 = -2.4 + 0.25

Combine like terms: -2.4 + 0.25 = -2.15
0.25 + -1a + a2 = -2.15

Factor a perfect square on the left side:
(a + -0.5)(a + -0.5) = -2.15

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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