(2a-3)(a-1)-4a-4=

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Solution for (2a-3)(a-1)-4a-4= equation:


Simplifying
(2a + -3)(a + -1) + -4a + -4 = 0

Reorder the terms:
(-3 + 2a)(a + -1) + -4a + -4 = 0

Reorder the terms:
(-3 + 2a)(-1 + a) + -4a + -4 = 0

Multiply (-3 + 2a) * (-1 + a)
(-3(-1 + a) + 2a * (-1 + a)) + -4a + -4 = 0
((-1 * -3 + a * -3) + 2a * (-1 + a)) + -4a + -4 = 0
((3 + -3a) + 2a * (-1 + a)) + -4a + -4 = 0
(3 + -3a + (-1 * 2a + a * 2a)) + -4a + -4 = 0
(3 + -3a + (-2a + 2a2)) + -4a + -4 = 0

Combine like terms: -3a + -2a = -5a
(3 + -5a + 2a2) + -4a + -4 = 0

Reorder the terms:
3 + -4 + -5a + -4a + 2a2 = 0

Combine like terms: 3 + -4 = -1
-1 + -5a + -4a + 2a2 = 0

Combine like terms: -5a + -4a = -9a
-1 + -9a + 2a2 = 0

Solving
-1 + -9a + 2a2 = 0

Solving for variable 'a'.

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

Divide each side by '2'.
-0.5 + -4.5a + a2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -4.5a + 0.5 + a2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -4.5a + a2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -4.5a + a2 = 0 + 0.5
-4.5a + a2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-4.5a + a2 = 0.5

The a term is -4.5a.  Take half its coefficient (-2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
-4.5a + 5.0625 + a2 = 0.5 + 5.0625

Reorder the terms:
5.0625 + -4.5a + a2 = 0.5 + 5.0625

Combine like terms: 0.5 + 5.0625 = 5.5625
5.0625 + -4.5a + a2 = 5.5625

Factor a perfect square on the left side:
(a + -2.25)(a + -2.25) = 5.5625

Calculate the square root of the right side: 2.358495283

Break this problem into two subproblems by setting 
(a + -2.25) equal to 2.358495283 and -2.358495283.

Subproblem 1

a + -2.25 = 2.358495283 Simplifying a + -2.25 = 2.358495283 Reorder the terms: -2.25 + a = 2.358495283 Solving -2.25 + a = 2.358495283 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + a = 2.358495283 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + a = 2.358495283 + 2.25 a = 2.358495283 + 2.25 Combine like terms: 2.358495283 + 2.25 = 4.608495283 a = 4.608495283 Simplifying a = 4.608495283

Subproblem 2

a + -2.25 = -2.358495283 Simplifying a + -2.25 = -2.358495283 Reorder the terms: -2.25 + a = -2.358495283 Solving -2.25 + a = -2.358495283 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + a = -2.358495283 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + a = -2.358495283 + 2.25 a = -2.358495283 + 2.25 Combine like terms: -2.358495283 + 2.25 = -0.108495283 a = -0.108495283 Simplifying a = -0.108495283

Solution

The solution to the problem is based on the solutions from the subproblems. a = {4.608495283, -0.108495283}

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