(7x^2-3x+14)+(2x^2+7x-75)=

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Solution for (7x^2-3x+14)+(2x^2+7x-75)= equation:


Simplifying
(7x2 + -3x + 14) + (2x2 + 7x + -75) = 0

Reorder the terms:
(14 + -3x + 7x2) + (2x2 + 7x + -75) = 0

Remove parenthesis around (14 + -3x + 7x2)
14 + -3x + 7x2 + (2x2 + 7x + -75) = 0

Reorder the terms:
14 + -3x + 7x2 + (-75 + 7x + 2x2) = 0

Remove parenthesis around (-75 + 7x + 2x2)
14 + -3x + 7x2 + -75 + 7x + 2x2 = 0

Reorder the terms:
14 + -75 + -3x + 7x + 7x2 + 2x2 = 0

Combine like terms: 14 + -75 = -61
-61 + -3x + 7x + 7x2 + 2x2 = 0

Combine like terms: -3x + 7x = 4x
-61 + 4x + 7x2 + 2x2 = 0

Combine like terms: 7x2 + 2x2 = 9x2
-61 + 4x + 9x2 = 0

Solving
-61 + 4x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-6.777777778 + 0.4444444444x + x2 = 0

Move the constant term to the right:

Add '6.777777778' to each side of the equation.
-6.777777778 + 0.4444444444x + 6.777777778 + x2 = 0 + 6.777777778

Reorder the terms:
-6.777777778 + 6.777777778 + 0.4444444444x + x2 = 0 + 6.777777778

Combine like terms: -6.777777778 + 6.777777778 = 0.000000000
0.000000000 + 0.4444444444x + x2 = 0 + 6.777777778
0.4444444444x + x2 = 0 + 6.777777778

Combine like terms: 0 + 6.777777778 = 6.777777778
0.4444444444x + x2 = 6.777777778

The x term is 0.4444444444x.  Take half its coefficient (0.2222222222).
Square it (0.04938271604) and add it to both sides.

Add '0.04938271604' to each side of the equation.
0.4444444444x + 0.04938271604 + x2 = 6.777777778 + 0.04938271604

Reorder the terms:
0.04938271604 + 0.4444444444x + x2 = 6.777777778 + 0.04938271604

Combine like terms: 6.777777778 + 0.04938271604 = 6.82716049404
0.04938271604 + 0.4444444444x + x2 = 6.82716049404

Factor a perfect square on the left side:
(x + 0.2222222222)(x + 0.2222222222) = 6.82716049404

Calculate the square root of the right side: 2.612883559

Break this problem into two subproblems by setting 
(x + 0.2222222222) equal to 2.612883559 and -2.612883559.

Subproblem 1

x + 0.2222222222 = 2.612883559 Simplifying x + 0.2222222222 = 2.612883559 Reorder the terms: 0.2222222222 + x = 2.612883559 Solving 0.2222222222 + x = 2.612883559 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + x = 2.612883559 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + x = 2.612883559 + -0.2222222222 x = 2.612883559 + -0.2222222222 Combine like terms: 2.612883559 + -0.2222222222 = 2.3906613368 x = 2.3906613368 Simplifying x = 2.3906613368

Subproblem 2

x + 0.2222222222 = -2.612883559 Simplifying x + 0.2222222222 = -2.612883559 Reorder the terms: 0.2222222222 + x = -2.612883559 Solving 0.2222222222 + x = -2.612883559 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + x = -2.612883559 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + x = -2.612883559 + -0.2222222222 x = -2.612883559 + -0.2222222222 Combine like terms: -2.612883559 + -0.2222222222 = -2.8351057812 x = -2.8351057812 Simplifying x = -2.8351057812

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.3906613368, -2.8351057812}

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