a(a-5)=32

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Solution for a(a-5)=32 equation:


Simplifying
a(a + -5) = 32

Reorder the terms:
a(-5 + a) = 32
(-5 * a + a * a) = 32
(-5a + a2) = 32

Solving
-5a + a2 = 32

Solving for variable 'a'.

Reorder the terms:
-32 + -5a + a2 = 32 + -32

Combine like terms: 32 + -32 = 0
-32 + -5a + a2 = 0

Begin completing the square.

Move the constant term to the right:

Add '32' to each side of the equation.
-32 + -5a + 32 + a2 = 0 + 32

Reorder the terms:
-32 + 32 + -5a + a2 = 0 + 32

Combine like terms: -32 + 32 = 0
0 + -5a + a2 = 0 + 32
-5a + a2 = 0 + 32

Combine like terms: 0 + 32 = 32
-5a + a2 = 32

The a term is -5a.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5a + 6.25 + a2 = 32 + 6.25

Reorder the terms:
6.25 + -5a + a2 = 32 + 6.25

Combine like terms: 32 + 6.25 = 38.25
6.25 + -5a + a2 = 38.25

Factor a perfect square on the left side:
(a + -2.5)(a + -2.5) = 38.25

Calculate the square root of the right side: 6.184658438

Break this problem into two subproblems by setting 
(a + -2.5) equal to 6.184658438 and -6.184658438.

Subproblem 1

a + -2.5 = 6.184658438 Simplifying a + -2.5 = 6.184658438 Reorder the terms: -2.5 + a = 6.184658438 Solving -2.5 + a = 6.184658438 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + a = 6.184658438 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + a = 6.184658438 + 2.5 a = 6.184658438 + 2.5 Combine like terms: 6.184658438 + 2.5 = 8.684658438 a = 8.684658438 Simplifying a = 8.684658438

Subproblem 2

a + -2.5 = -6.184658438 Simplifying a + -2.5 = -6.184658438 Reorder the terms: -2.5 + a = -6.184658438 Solving -2.5 + a = -6.184658438 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + a = -6.184658438 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + a = -6.184658438 + 2.5 a = -6.184658438 + 2.5 Combine like terms: -6.184658438 + 2.5 = -3.684658438 a = -3.684658438 Simplifying a = -3.684658438

Solution

The solution to the problem is based on the solutions from the subproblems. a = {8.684658438, -3.684658438}

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