7(a+8)a=32

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Solution for 7(a+8)a=32 equation:


Simplifying
7(a + 8) * a = 32

Reorder the terms:
7(8 + a) * a = 32

Reorder the terms for easier multiplication:
7a(8 + a) = 32
(8 * 7a + a * 7a) = 32
(56a + 7a2) = 32

Solving
56a + 7a2 = 32

Solving for variable 'a'.

Reorder the terms:
-32 + 56a + 7a2 = 32 + -32

Combine like terms: 32 + -32 = 0
-32 + 56a + 7a2 = 0

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

Divide each side by '7'.
-4.571428571 + 8a + a2 = 0

Move the constant term to the right:

Add '4.571428571' to each side of the equation.
-4.571428571 + 8a + 4.571428571 + a2 = 0 + 4.571428571

Reorder the terms:
-4.571428571 + 4.571428571 + 8a + a2 = 0 + 4.571428571

Combine like terms: -4.571428571 + 4.571428571 = 0.000000000
0.000000000 + 8a + a2 = 0 + 4.571428571
8a + a2 = 0 + 4.571428571

Combine like terms: 0 + 4.571428571 = 4.571428571
8a + a2 = 4.571428571

The a term is 8a.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8a + 16 + a2 = 4.571428571 + 16

Reorder the terms:
16 + 8a + a2 = 4.571428571 + 16

Combine like terms: 4.571428571 + 16 = 20.571428571
16 + 8a + a2 = 20.571428571

Factor a perfect square on the left side:
(a + 4)(a + 4) = 20.571428571

Calculate the square root of the right side: 4.535573676

Break this problem into two subproblems by setting 
(a + 4) equal to 4.535573676 and -4.535573676.

Subproblem 1

a + 4 = 4.535573676 Simplifying a + 4 = 4.535573676 Reorder the terms: 4 + a = 4.535573676 Solving 4 + a = 4.535573676 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + a = 4.535573676 + -4 Combine like terms: 4 + -4 = 0 0 + a = 4.535573676 + -4 a = 4.535573676 + -4 Combine like terms: 4.535573676 + -4 = 0.535573676 a = 0.535573676 Simplifying a = 0.535573676

Subproblem 2

a + 4 = -4.535573676 Simplifying a + 4 = -4.535573676 Reorder the terms: 4 + a = -4.535573676 Solving 4 + a = -4.535573676 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + a = -4.535573676 + -4 Combine like terms: 4 + -4 = 0 0 + a = -4.535573676 + -4 a = -4.535573676 + -4 Combine like terms: -4.535573676 + -4 = -8.535573676 a = -8.535573676 Simplifying a = -8.535573676

Solution

The solution to the problem is based on the solutions from the subproblems. a = {0.535573676, -8.535573676}

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