8a(a)+10a=-11a+4

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Solution for 8a(a)+10a=-11a+4 equation:


Simplifying
8a(a) + 10a = -11a + 4

Multiply a * a
8a2 + 10a = -11a + 4

Reorder the terms:
10a + 8a2 = -11a + 4

Reorder the terms:
10a + 8a2 = 4 + -11a

Solving
10a + 8a2 = 4 + -11a

Solving for variable 'a'.

Reorder the terms:
-4 + 10a + 11a + 8a2 = 4 + -11a + -4 + 11a

Combine like terms: 10a + 11a = 21a
-4 + 21a + 8a2 = 4 + -11a + -4 + 11a

Reorder the terms:
-4 + 21a + 8a2 = 4 + -4 + -11a + 11a

Combine like terms: 4 + -4 = 0
-4 + 21a + 8a2 = 0 + -11a + 11a
-4 + 21a + 8a2 = -11a + 11a

Combine like terms: -11a + 11a = 0
-4 + 21a + 8a2 = 0

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

Divide each side by '8'.
-0.5 + 2.625a + a2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + 2.625a + 0.5 + a2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + 2.625a + a2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + 2.625a + a2 = 0 + 0.5
2.625a + a2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
2.625a + a2 = 0.5

The a term is 2.625a.  Take half its coefficient (1.3125).
Square it (1.72265625) and add it to both sides.

Add '1.72265625' to each side of the equation.
2.625a + 1.72265625 + a2 = 0.5 + 1.72265625

Reorder the terms:
1.72265625 + 2.625a + a2 = 0.5 + 1.72265625

Combine like terms: 0.5 + 1.72265625 = 2.22265625
1.72265625 + 2.625a + a2 = 2.22265625

Factor a perfect square on the left side:
(a + 1.3125)(a + 1.3125) = 2.22265625

Calculate the square root of the right side: 1.490857555

Break this problem into two subproblems by setting 
(a + 1.3125) equal to 1.490857555 and -1.490857555.

Subproblem 1

a + 1.3125 = 1.490857555 Simplifying a + 1.3125 = 1.490857555 Reorder the terms: 1.3125 + a = 1.490857555 Solving 1.3125 + a = 1.490857555 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1.3125' to each side of the equation. 1.3125 + -1.3125 + a = 1.490857555 + -1.3125 Combine like terms: 1.3125 + -1.3125 = 0.0000 0.0000 + a = 1.490857555 + -1.3125 a = 1.490857555 + -1.3125 Combine like terms: 1.490857555 + -1.3125 = 0.178357555 a = 0.178357555 Simplifying a = 0.178357555

Subproblem 2

a + 1.3125 = -1.490857555 Simplifying a + 1.3125 = -1.490857555 Reorder the terms: 1.3125 + a = -1.490857555 Solving 1.3125 + a = -1.490857555 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1.3125' to each side of the equation. 1.3125 + -1.3125 + a = -1.490857555 + -1.3125 Combine like terms: 1.3125 + -1.3125 = 0.0000 0.0000 + a = -1.490857555 + -1.3125 a = -1.490857555 + -1.3125 Combine like terms: -1.490857555 + -1.3125 = -2.803357555 a = -2.803357555 Simplifying a = -2.803357555

Solution

The solution to the problem is based on the solutions from the subproblems. a = {0.178357555, -2.803357555}

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