(13a^2+13a-8)-(-4a^2+3a+4)=

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Solution for (13a^2+13a-8)-(-4a^2+3a+4)= equation:


Simplifying
(13a2 + 13a + -8) + -1(-4a2 + 3a + 4) = 0

Reorder the terms:
(-8 + 13a + 13a2) + -1(-4a2 + 3a + 4) = 0

Remove parenthesis around (-8 + 13a + 13a2)
-8 + 13a + 13a2 + -1(-4a2 + 3a + 4) = 0

Reorder the terms:
-8 + 13a + 13a2 + -1(4 + 3a + -4a2) = 0
-8 + 13a + 13a2 + (4 * -1 + 3a * -1 + -4a2 * -1) = 0
-8 + 13a + 13a2 + (-4 + -3a + 4a2) = 0

Reorder the terms:
-8 + -4 + 13a + -3a + 13a2 + 4a2 = 0

Combine like terms: -8 + -4 = -12
-12 + 13a + -3a + 13a2 + 4a2 = 0

Combine like terms: 13a + -3a = 10a
-12 + 10a + 13a2 + 4a2 = 0

Combine like terms: 13a2 + 4a2 = 17a2
-12 + 10a + 17a2 = 0

Solving
-12 + 10a + 17a2 = 0

Solving for variable 'a'.

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

Divide each side by '17'.
-0.7058823529 + 0.5882352941a + a2 = 0

Move the constant term to the right:

Add '0.7058823529' to each side of the equation.
-0.7058823529 + 0.5882352941a + 0.7058823529 + a2 = 0 + 0.7058823529

Reorder the terms:
-0.7058823529 + 0.7058823529 + 0.5882352941a + a2 = 0 + 0.7058823529

Combine like terms: -0.7058823529 + 0.7058823529 = 0.0000000000
0.0000000000 + 0.5882352941a + a2 = 0 + 0.7058823529
0.5882352941a + a2 = 0 + 0.7058823529

Combine like terms: 0 + 0.7058823529 = 0.7058823529
0.5882352941a + a2 = 0.7058823529

The a term is 0.5882352941a.  Take half its coefficient (0.2941176471).
Square it (0.08650519034) and add it to both sides.

Add '0.08650519034' to each side of the equation.
0.5882352941a + 0.08650519034 + a2 = 0.7058823529 + 0.08650519034

Reorder the terms:
0.08650519034 + 0.5882352941a + a2 = 0.7058823529 + 0.08650519034

Combine like terms: 0.7058823529 + 0.08650519034 = 0.79238754324
0.08650519034 + 0.5882352941a + a2 = 0.79238754324

Factor a perfect square on the left side:
(a + 0.2941176471)(a + 0.2941176471) = 0.79238754324

Calculate the square root of the right side: 0.890161526

Break this problem into two subproblems by setting 
(a + 0.2941176471) equal to 0.890161526 and -0.890161526.

Subproblem 1

a + 0.2941176471 = 0.890161526 Simplifying a + 0.2941176471 = 0.890161526 Reorder the terms: 0.2941176471 + a = 0.890161526 Solving 0.2941176471 + a = 0.890161526 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.2941176471' to each side of the equation. 0.2941176471 + -0.2941176471 + a = 0.890161526 + -0.2941176471 Combine like terms: 0.2941176471 + -0.2941176471 = 0.0000000000 0.0000000000 + a = 0.890161526 + -0.2941176471 a = 0.890161526 + -0.2941176471 Combine like terms: 0.890161526 + -0.2941176471 = 0.5960438789 a = 0.5960438789 Simplifying a = 0.5960438789

Subproblem 2

a + 0.2941176471 = -0.890161526 Simplifying a + 0.2941176471 = -0.890161526 Reorder the terms: 0.2941176471 + a = -0.890161526 Solving 0.2941176471 + a = -0.890161526 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.2941176471' to each side of the equation. 0.2941176471 + -0.2941176471 + a = -0.890161526 + -0.2941176471 Combine like terms: 0.2941176471 + -0.2941176471 = 0.0000000000 0.0000000000 + a = -0.890161526 + -0.2941176471 a = -0.890161526 + -0.2941176471 Combine like terms: -0.890161526 + -0.2941176471 = -1.1842791731 a = -1.1842791731 Simplifying a = -1.1842791731

Solution

The solution to the problem is based on the solutions from the subproblems. a = {0.5960438789, -1.1842791731}

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