(a*2)+(a+4)(a-1)=14

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Solution for (a*2)+(a+4)(a-1)=14 equation:


Simplifying
(a * 2) + (a + 4)(a + -1) = 14

Reorder the terms for easier multiplication:
(2a) + (a + 4)(a + -1) = 14

Reorder the terms:
(2a) + (4 + a)(a + -1) = 14

Reorder the terms:
(2a) + (4 + a)(-1 + a) = 14

Multiply (4 + a) * (-1 + a)
(2a) + (4(-1 + a) + a(-1 + a)) = 14
(2a) + ((-1 * 4 + a * 4) + a(-1 + a)) = 14
(2a) + ((-4 + 4a) + a(-1 + a)) = 14
(2a) + (-4 + 4a + (-1 * a + a * a)) = 14
(2a) + (-4 + 4a + (-1a + a2)) = 14

Combine like terms: 4a + -1a = 3a
(2a) + (-4 + 3a + a2) = 14

Reorder the terms:
-4 + (2a) + 3a + a2 = 14

Combine like terms: (2a) + 3a = 5a
-4 + 5a + a2 = 14

Solving
-4 + 5a + a2 = 14

Solving for variable 'a'.

Reorder the terms:
-4 + -14 + 5a + a2 = 14 + -14

Combine like terms: -4 + -14 = -18
-18 + 5a + a2 = 14 + -14

Combine like terms: 14 + -14 = 0
-18 + 5a + a2 = 0

Begin completing the square.

Move the constant term to the right:

Add '18' to each side of the equation.
-18 + 5a + 18 + a2 = 0 + 18

Reorder the terms:
-18 + 18 + 5a + a2 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + 5a + a2 = 0 + 18
5a + a2 = 0 + 18

Combine like terms: 0 + 18 = 18
5a + a2 = 18

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 = 18 + 6.25

Reorder the terms:
6.25 + 5a + a2 = 18 + 6.25

Combine like terms: 18 + 6.25 = 24.25
6.25 + 5a + a2 = 24.25

Factor a perfect square on the left side:
(a + 2.5)(a + 2.5) = 24.25

Calculate the square root of the right side: 4.924428901

Break this problem into two subproblems by setting 
(a + 2.5) equal to 4.924428901 and -4.924428901.

Subproblem 1

a + 2.5 = 4.924428901 Simplifying a + 2.5 = 4.924428901 Reorder the terms: 2.5 + a = 4.924428901 Solving 2.5 + a = 4.924428901 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 = 4.924428901 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + a = 4.924428901 + -2.5 a = 4.924428901 + -2.5 Combine like terms: 4.924428901 + -2.5 = 2.424428901 a = 2.424428901 Simplifying a = 2.424428901

Subproblem 2

a + 2.5 = -4.924428901 Simplifying a + 2.5 = -4.924428901 Reorder the terms: 2.5 + a = -4.924428901 Solving 2.5 + a = -4.924428901 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 = -4.924428901 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + a = -4.924428901 + -2.5 a = -4.924428901 + -2.5 Combine like terms: -4.924428901 + -2.5 = -7.424428901 a = -7.424428901 Simplifying a = -7.424428901

Solution

The solution to the problem is based on the solutions from the subproblems. a = {2.424428901, -7.424428901}

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