(3x^2-7x+14)+8x^2+9x-89=

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Solution for (3x^2-7x+14)+8x^2+9x-89= equation:


Simplifying
(3x2 + -7x + 14) + 8x2 + 9x + -89 = 0

Reorder the terms:
(14 + -7x + 3x2) + 8x2 + 9x + -89 = 0

Remove parenthesis around (14 + -7x + 3x2)
14 + -7x + 3x2 + 8x2 + 9x + -89 = 0

Reorder the terms:
14 + -89 + -7x + 9x + 3x2 + 8x2 = 0

Combine like terms: 14 + -89 = -75
-75 + -7x + 9x + 3x2 + 8x2 = 0

Combine like terms: -7x + 9x = 2x
-75 + 2x + 3x2 + 8x2 = 0

Combine like terms: 3x2 + 8x2 = 11x2
-75 + 2x + 11x2 = 0

Solving
-75 + 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'.
-6.818181818 + 0.1818181818x + x2 = 0

Move the constant term to the right:

Add '6.818181818' to each side of the equation.
-6.818181818 + 0.1818181818x + 6.818181818 + x2 = 0 + 6.818181818

Reorder the terms:
-6.818181818 + 6.818181818 + 0.1818181818x + x2 = 0 + 6.818181818

Combine like terms: -6.818181818 + 6.818181818 = 0.000000000
0.000000000 + 0.1818181818x + x2 = 0 + 6.818181818
0.1818181818x + x2 = 0 + 6.818181818

Combine like terms: 0 + 6.818181818 = 6.818181818
0.1818181818x + x2 = 6.818181818

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 = 6.818181818 + 0.008264462808

Reorder the terms:
0.008264462808 + 0.1818181818x + x2 = 6.818181818 + 0.008264462808

Combine like terms: 6.818181818 + 0.008264462808 = 6.826446280808
0.008264462808 + 0.1818181818x + x2 = 6.826446280808

Factor a perfect square on the left side:
(x + 0.0909090909)(x + 0.0909090909) = 6.826446280808

Calculate the square root of the right side: 2.612746884

Break this problem into two subproblems by setting 
(x + 0.0909090909) equal to 2.612746884 and -2.612746884.

Subproblem 1

x + 0.0909090909 = 2.612746884 Simplifying x + 0.0909090909 = 2.612746884 Reorder the terms: 0.0909090909 + x = 2.612746884 Solving 0.0909090909 + x = 2.612746884 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 = 2.612746884 + -0.0909090909 Combine like terms: 0.0909090909 + -0.0909090909 = 0.0000000000 0.0000000000 + x = 2.612746884 + -0.0909090909 x = 2.612746884 + -0.0909090909 Combine like terms: 2.612746884 + -0.0909090909 = 2.5218377931 x = 2.5218377931 Simplifying x = 2.5218377931

Subproblem 2

x + 0.0909090909 = -2.612746884 Simplifying x + 0.0909090909 = -2.612746884 Reorder the terms: 0.0909090909 + x = -2.612746884 Solving 0.0909090909 + x = -2.612746884 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 = -2.612746884 + -0.0909090909 Combine like terms: 0.0909090909 + -0.0909090909 = 0.0000000000 0.0000000000 + x = -2.612746884 + -0.0909090909 x = -2.612746884 + -0.0909090909 Combine like terms: -2.612746884 + -0.0909090909 = -2.7036559749 x = -2.7036559749 Simplifying x = -2.7036559749

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.5218377931, -2.7036559749}

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