(4x^2-6x-26)+(7x^2+8x)=

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Solution for (4x^2-6x-26)+(7x^2+8x)= equation:


Simplifying
(4x2 + -6x + -26) + (7x2 + 8x) = 0

Reorder the terms:
(-26 + -6x + 4x2) + (7x2 + 8x) = 0

Remove parenthesis around (-26 + -6x + 4x2)
-26 + -6x + 4x2 + (7x2 + 8x) = 0

Reorder the terms:
-26 + -6x + 4x2 + (8x + 7x2) = 0

Remove parenthesis around (8x + 7x2)
-26 + -6x + 4x2 + 8x + 7x2 = 0

Reorder the terms:
-26 + -6x + 8x + 4x2 + 7x2 = 0

Combine like terms: -6x + 8x = 2x
-26 + 2x + 4x2 + 7x2 = 0

Combine like terms: 4x2 + 7x2 = 11x2
-26 + 2x + 11x2 = 0

Solving
-26 + 2x + 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'.
-2.363636364 + 0.1818181818x + x2 = 0

Move the constant term to the right:

Add '2.363636364' to each side of the equation.
-2.363636364 + 0.1818181818x + 2.363636364 + x2 = 0 + 2.363636364

Reorder the terms:
-2.363636364 + 2.363636364 + 0.1818181818x + x2 = 0 + 2.363636364

Combine like terms: -2.363636364 + 2.363636364 = 0.000000000
0.000000000 + 0.1818181818x + x2 = 0 + 2.363636364
0.1818181818x + x2 = 0 + 2.363636364

Combine like terms: 0 + 2.363636364 = 2.363636364
0.1818181818x + x2 = 2.363636364

The x term is 0.1818181818x.  Take half its coefficient (0.0909090909).
Square it (0.008264462808) and add it to both sides.

Add '0.008264462808' to each side of the equation.
0.1818181818x + 0.008264462808 + x2 = 2.363636364 + 0.008264462808

Reorder the terms:
0.008264462808 + 0.1818181818x + x2 = 2.363636364 + 0.008264462808

Combine like terms: 2.363636364 + 0.008264462808 = 2.371900826808
0.008264462808 + 0.1818181818x + x2 = 2.371900826808

Factor a perfect square on the left side:
(x + 0.0909090909)(x + 0.0909090909) = 2.371900826808

Calculate the square root of the right side: 1.540097668

Break this problem into two subproblems by setting 
(x + 0.0909090909) equal to 1.540097668 and -1.540097668.

Subproblem 1

x + 0.0909090909 = 1.540097668 Simplifying x + 0.0909090909 = 1.540097668 Reorder the terms: 0.0909090909 + x = 1.540097668 Solving 0.0909090909 + x = 1.540097668 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0909090909' to each side of the equation. 0.0909090909 + -0.0909090909 + x = 1.540097668 + -0.0909090909 Combine like terms: 0.0909090909 + -0.0909090909 = 0.0000000000 0.0000000000 + x = 1.540097668 + -0.0909090909 x = 1.540097668 + -0.0909090909 Combine like terms: 1.540097668 + -0.0909090909 = 1.4491885771 x = 1.4491885771 Simplifying x = 1.4491885771

Subproblem 2

x + 0.0909090909 = -1.540097668 Simplifying x + 0.0909090909 = -1.540097668 Reorder the terms: 0.0909090909 + x = -1.540097668 Solving 0.0909090909 + x = -1.540097668 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0909090909' to each side of the equation. 0.0909090909 + -0.0909090909 + x = -1.540097668 + -0.0909090909 Combine like terms: 0.0909090909 + -0.0909090909 = 0.0000000000 0.0000000000 + x = -1.540097668 + -0.0909090909 x = -1.540097668 + -0.0909090909 Combine like terms: -1.540097668 + -0.0909090909 = -1.6310067589 x = -1.6310067589 Simplifying x = -1.6310067589

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.4491885771, -1.6310067589}

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