7(x+1)3-3(x+5)2-4(x+1)(x-2)-2=0

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Solution for 7(x+1)3-3(x+5)2-4(x+1)(x-2)-2=0 equation:


Simplifying
7(x + 1) * 3 + -3(x + 5) * 2 + -4(x + 1)(x + -2) + -2 = 0

Reorder the terms:
7(1 + x) * 3 + -3(x + 5) * 2 + -4(x + 1)(x + -2) + -2 = 0

Reorder the terms for easier multiplication:
7 * 3(1 + x) + -3(x + 5) * 2 + -4(x + 1)(x + -2) + -2 = 0

Multiply 7 * 3
21(1 + x) + -3(x + 5) * 2 + -4(x + 1)(x + -2) + -2 = 0
(1 * 21 + x * 21) + -3(x + 5) * 2 + -4(x + 1)(x + -2) + -2 = 0
(21 + 21x) + -3(x + 5) * 2 + -4(x + 1)(x + -2) + -2 = 0

Reorder the terms:
21 + 21x + -3(5 + x) * 2 + -4(x + 1)(x + -2) + -2 = 0

Reorder the terms for easier multiplication:
21 + 21x + -3 * 2(5 + x) + -4(x + 1)(x + -2) + -2 = 0

Multiply -3 * 2
21 + 21x + -6(5 + x) + -4(x + 1)(x + -2) + -2 = 0
21 + 21x + (5 * -6 + x * -6) + -4(x + 1)(x + -2) + -2 = 0
21 + 21x + (-30 + -6x) + -4(x + 1)(x + -2) + -2 = 0

Reorder the terms:
21 + 21x + -30 + -6x + -4(1 + x)(x + -2) + -2 = 0

Reorder the terms:
21 + 21x + -30 + -6x + -4(1 + x)(-2 + x) + -2 = 0

Multiply (1 + x) * (-2 + x)
21 + 21x + -30 + -6x + -4(1(-2 + x) + x(-2 + x)) + -2 = 0
21 + 21x + -30 + -6x + -4((-2 * 1 + x * 1) + x(-2 + x)) + -2 = 0
21 + 21x + -30 + -6x + -4((-2 + 1x) + x(-2 + x)) + -2 = 0
21 + 21x + -30 + -6x + -4(-2 + 1x + (-2 * x + x * x)) + -2 = 0
21 + 21x + -30 + -6x + -4(-2 + 1x + (-2x + x2)) + -2 = 0

Combine like terms: 1x + -2x = -1x
21 + 21x + -30 + -6x + -4(-2 + -1x + x2) + -2 = 0
21 + 21x + -30 + -6x + (-2 * -4 + -1x * -4 + x2 * -4) + -2 = 0
21 + 21x + -30 + -6x + (8 + 4x + -4x2) + -2 = 0

Reorder the terms:
21 + -30 + 8 + -2 + 21x + -6x + 4x + -4x2 = 0

Combine like terms: 21 + -30 = -9
-9 + 8 + -2 + 21x + -6x + 4x + -4x2 = 0

Combine like terms: -9 + 8 = -1
-1 + -2 + 21x + -6x + 4x + -4x2 = 0

Combine like terms: -1 + -2 = -3
-3 + 21x + -6x + 4x + -4x2 = 0

Combine like terms: 21x + -6x = 15x
-3 + 15x + 4x + -4x2 = 0

Combine like terms: 15x + 4x = 19x
-3 + 19x + -4x2 = 0

Solving
-3 + 19x + -4x2 = 0

Solving for variable 'x'.

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

Divide each side by '-4'.
0.75 + -4.75x + x2 = 0

Move the constant term to the right:

Add '-0.75' to each side of the equation.
0.75 + -4.75x + -0.75 + x2 = 0 + -0.75

Reorder the terms:
0.75 + -0.75 + -4.75x + x2 = 0 + -0.75

Combine like terms: 0.75 + -0.75 = 0.00
0.00 + -4.75x + x2 = 0 + -0.75
-4.75x + x2 = 0 + -0.75

Combine like terms: 0 + -0.75 = -0.75
-4.75x + x2 = -0.75

The x term is -4.75x.  Take half its coefficient (-2.375).
Square it (5.640625) and add it to both sides.

Add '5.640625' to each side of the equation.
-4.75x + 5.640625 + x2 = -0.75 + 5.640625

Reorder the terms:
5.640625 + -4.75x + x2 = -0.75 + 5.640625

Combine like terms: -0.75 + 5.640625 = 4.890625
5.640625 + -4.75x + x2 = 4.890625

Factor a perfect square on the left side:
(x + -2.375)(x + -2.375) = 4.890625

Calculate the square root of the right side: 2.211475752

Break this problem into two subproblems by setting 
(x + -2.375) equal to 2.211475752 and -2.211475752.

Subproblem 1

x + -2.375 = 2.211475752 Simplifying x + -2.375 = 2.211475752 Reorder the terms: -2.375 + x = 2.211475752 Solving -2.375 + x = 2.211475752 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.375' to each side of the equation. -2.375 + 2.375 + x = 2.211475752 + 2.375 Combine like terms: -2.375 + 2.375 = 0.000 0.000 + x = 2.211475752 + 2.375 x = 2.211475752 + 2.375 Combine like terms: 2.211475752 + 2.375 = 4.586475752 x = 4.586475752 Simplifying x = 4.586475752

Subproblem 2

x + -2.375 = -2.211475752 Simplifying x + -2.375 = -2.211475752 Reorder the terms: -2.375 + x = -2.211475752 Solving -2.375 + x = -2.211475752 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.375' to each side of the equation. -2.375 + 2.375 + x = -2.211475752 + 2.375 Combine like terms: -2.375 + 2.375 = 0.000 0.000 + x = -2.211475752 + 2.375 x = -2.211475752 + 2.375 Combine like terms: -2.211475752 + 2.375 = 0.163524248 x = 0.163524248 Simplifying x = 0.163524248

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.586475752, 0.163524248}

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