(7x^2-2x-60)+(4x^2+8x)=

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Solution for (7x^2-2x-60)+(4x^2+8x)= equation:


Simplifying
(7x2 + -2x + -60) + (4x2 + 8x) = 0

Reorder the terms:
(-60 + -2x + 7x2) + (4x2 + 8x) = 0

Remove parenthesis around (-60 + -2x + 7x2)
-60 + -2x + 7x2 + (4x2 + 8x) = 0

Reorder the terms:
-60 + -2x + 7x2 + (8x + 4x2) = 0

Remove parenthesis around (8x + 4x2)
-60 + -2x + 7x2 + 8x + 4x2 = 0

Reorder the terms:
-60 + -2x + 8x + 7x2 + 4x2 = 0

Combine like terms: -2x + 8x = 6x
-60 + 6x + 7x2 + 4x2 = 0

Combine like terms: 7x2 + 4x2 = 11x2
-60 + 6x + 11x2 = 0

Solving
-60 + 6x + 11x2 = 0

Solving for variable 'x'.

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

Divide each side by '11'.
-5.454545455 + 0.5454545455x + x2 = 0

Move the constant term to the right:

Add '5.454545455' to each side of the equation.
-5.454545455 + 0.5454545455x + 5.454545455 + x2 = 0 + 5.454545455

Reorder the terms:
-5.454545455 + 5.454545455 + 0.5454545455x + x2 = 0 + 5.454545455

Combine like terms: -5.454545455 + 5.454545455 = 0.000000000
0.000000000 + 0.5454545455x + x2 = 0 + 5.454545455
0.5454545455x + x2 = 0 + 5.454545455

Combine like terms: 0 + 5.454545455 = 5.454545455
0.5454545455x + x2 = 5.454545455

The x term is 0.5454545455x.  Take half its coefficient (0.2727272728).
Square it (0.07438016533) and add it to both sides.

Add '0.07438016533' to each side of the equation.
0.5454545455x + 0.07438016533 + x2 = 5.454545455 + 0.07438016533

Reorder the terms:
0.07438016533 + 0.5454545455x + x2 = 5.454545455 + 0.07438016533

Combine like terms: 5.454545455 + 0.07438016533 = 5.52892562033
0.07438016533 + 0.5454545455x + x2 = 5.52892562033

Factor a perfect square on the left side:
(x + 0.2727272728)(x + 0.2727272728) = 5.52892562033

Calculate the square root of the right side: 2.351366756

Break this problem into two subproblems by setting 
(x + 0.2727272728) equal to 2.351366756 and -2.351366756.

Subproblem 1

x + 0.2727272728 = 2.351366756 Simplifying x + 0.2727272728 = 2.351366756 Reorder the terms: 0.2727272728 + x = 2.351366756 Solving 0.2727272728 + x = 2.351366756 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2727272728' to each side of the equation. 0.2727272728 + -0.2727272728 + x = 2.351366756 + -0.2727272728 Combine like terms: 0.2727272728 + -0.2727272728 = 0.0000000000 0.0000000000 + x = 2.351366756 + -0.2727272728 x = 2.351366756 + -0.2727272728 Combine like terms: 2.351366756 + -0.2727272728 = 2.0786394832 x = 2.0786394832 Simplifying x = 2.0786394832

Subproblem 2

x + 0.2727272728 = -2.351366756 Simplifying x + 0.2727272728 = -2.351366756 Reorder the terms: 0.2727272728 + x = -2.351366756 Solving 0.2727272728 + x = -2.351366756 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2727272728' to each side of the equation. 0.2727272728 + -0.2727272728 + x = -2.351366756 + -0.2727272728 Combine like terms: 0.2727272728 + -0.2727272728 = 0.0000000000 0.0000000000 + x = -2.351366756 + -0.2727272728 x = -2.351366756 + -0.2727272728 Combine like terms: -2.351366756 + -0.2727272728 = -2.6240940288 x = -2.6240940288 Simplifying x = -2.6240940288

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.0786394832, -2.6240940288}

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