(2a-5)(2a-5)=60

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Solution for (2a-5)(2a-5)=60 equation:


Simplifying
(2a + -5)(2a + -5) = 60

Reorder the terms:
(-5 + 2a)(2a + -5) = 60

Reorder the terms:
(-5 + 2a)(-5 + 2a) = 60

Multiply (-5 + 2a) * (-5 + 2a)
(-5(-5 + 2a) + 2a * (-5 + 2a)) = 60
((-5 * -5 + 2a * -5) + 2a * (-5 + 2a)) = 60
((25 + -10a) + 2a * (-5 + 2a)) = 60
(25 + -10a + (-5 * 2a + 2a * 2a)) = 60
(25 + -10a + (-10a + 4a2)) = 60

Combine like terms: -10a + -10a = -20a
(25 + -20a + 4a2) = 60

Solving
25 + -20a + 4a2 = 60

Solving for variable 'a'.

Reorder the terms:
25 + -60 + -20a + 4a2 = 60 + -60

Combine like terms: 25 + -60 = -35
-35 + -20a + 4a2 = 60 + -60

Combine like terms: 60 + -60 = 0
-35 + -20a + 4a2 = 0

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

Divide each side by '4'.
-8.75 + -5a + a2 = 0

Move the constant term to the right:

Add '8.75' to each side of the equation.
-8.75 + -5a + 8.75 + a2 = 0 + 8.75

Reorder the terms:
-8.75 + 8.75 + -5a + a2 = 0 + 8.75

Combine like terms: -8.75 + 8.75 = 0.00
0.00 + -5a + a2 = 0 + 8.75
-5a + a2 = 0 + 8.75

Combine like terms: 0 + 8.75 = 8.75
-5a + a2 = 8.75

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 = 8.75 + 6.25

Reorder the terms:
6.25 + -5a + a2 = 8.75 + 6.25

Combine like terms: 8.75 + 6.25 = 15
6.25 + -5a + a2 = 15

Factor a perfect square on the left side:
(a + -2.5)(a + -2.5) = 15

Calculate the square root of the right side: 3.872983346

Break this problem into two subproblems by setting 
(a + -2.5) equal to 3.872983346 and -3.872983346.

Subproblem 1

a + -2.5 = 3.872983346 Simplifying a + -2.5 = 3.872983346 Reorder the terms: -2.5 + a = 3.872983346 Solving -2.5 + a = 3.872983346 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 = 3.872983346 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + a = 3.872983346 + 2.5 a = 3.872983346 + 2.5 Combine like terms: 3.872983346 + 2.5 = 6.372983346 a = 6.372983346 Simplifying a = 6.372983346

Subproblem 2

a + -2.5 = -3.872983346 Simplifying a + -2.5 = -3.872983346 Reorder the terms: -2.5 + a = -3.872983346 Solving -2.5 + a = -3.872983346 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 = -3.872983346 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + a = -3.872983346 + 2.5 a = -3.872983346 + 2.5 Combine like terms: -3.872983346 + 2.5 = -1.372983346 a = -1.372983346 Simplifying a = -1.372983346

Solution

The solution to the problem is based on the solutions from the subproblems. a = {6.372983346, -1.372983346}

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