50a^2+75a^2-8a-12=0

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Solution for 50a^2+75a^2-8a-12=0 equation:


Simplifying
50a2 + 75a2 + -8a + -12 = 0

Reorder the terms:
-12 + -8a + 50a2 + 75a2 = 0

Combine like terms: 50a2 + 75a2 = 125a2
-12 + -8a + 125a2 = 0

Solving
-12 + -8a + 125a2 = 0

Solving for variable 'a'.

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

Divide each side by '125'.
-0.096 + -0.064a + a2 = 0

Move the constant term to the right:

Add '0.096' to each side of the equation.
-0.096 + -0.064a + 0.096 + a2 = 0 + 0.096

Reorder the terms:
-0.096 + 0.096 + -0.064a + a2 = 0 + 0.096

Combine like terms: -0.096 + 0.096 = 0.000
0.000 + -0.064a + a2 = 0 + 0.096
-0.064a + a2 = 0 + 0.096

Combine like terms: 0 + 0.096 = 0.096
-0.064a + a2 = 0.096

The a term is -0.064a.  Take half its coefficient (-0.032).
Square it (0.001024) and add it to both sides.

Add '0.001024' to each side of the equation.
-0.064a + 0.001024 + a2 = 0.096 + 0.001024

Reorder the terms:
0.001024 + -0.064a + a2 = 0.096 + 0.001024

Combine like terms: 0.096 + 0.001024 = 0.097024
0.001024 + -0.064a + a2 = 0.097024

Factor a perfect square on the left side:
(a + -0.032)(a + -0.032) = 0.097024

Calculate the square root of the right side: 0.311486757

Break this problem into two subproblems by setting 
(a + -0.032) equal to 0.311486757 and -0.311486757.

Subproblem 1

a + -0.032 = 0.311486757 Simplifying a + -0.032 = 0.311486757 Reorder the terms: -0.032 + a = 0.311486757 Solving -0.032 + a = 0.311486757 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.032' to each side of the equation. -0.032 + 0.032 + a = 0.311486757 + 0.032 Combine like terms: -0.032 + 0.032 = 0.000 0.000 + a = 0.311486757 + 0.032 a = 0.311486757 + 0.032 Combine like terms: 0.311486757 + 0.032 = 0.343486757 a = 0.343486757 Simplifying a = 0.343486757

Subproblem 2

a + -0.032 = -0.311486757 Simplifying a + -0.032 = -0.311486757 Reorder the terms: -0.032 + a = -0.311486757 Solving -0.032 + a = -0.311486757 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.032' to each side of the equation. -0.032 + 0.032 + a = -0.311486757 + 0.032 Combine like terms: -0.032 + 0.032 = 0.000 0.000 + a = -0.311486757 + 0.032 a = -0.311486757 + 0.032 Combine like terms: -0.311486757 + 0.032 = -0.279486757 a = -0.279486757 Simplifying a = -0.279486757

Solution

The solution to the problem is based on the solutions from the subproblems. a = {0.343486757, -0.279486757}

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