(-x^2+3x)+(2x^2+7)+(5x-2)=

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Solution for (-x^2+3x)+(2x^2+7)+(5x-2)= equation:


Simplifying
(-1x2 + 3x) + (2x2 + 7) + (5x + -2) = 0

Reorder the terms:
(3x + -1x2) + (2x2 + 7) + (5x + -2) = 0

Remove parenthesis around (3x + -1x2)
3x + -1x2 + (2x2 + 7) + (5x + -2) = 0

Reorder the terms:
3x + -1x2 + (7 + 2x2) + (5x + -2) = 0

Remove parenthesis around (7 + 2x2)
3x + -1x2 + 7 + 2x2 + (5x + -2) = 0

Reorder the terms:
3x + -1x2 + 7 + 2x2 + (-2 + 5x) = 0

Remove parenthesis around (-2 + 5x)
3x + -1x2 + 7 + 2x2 + -2 + 5x = 0

Reorder the terms:
7 + -2 + 3x + 5x + -1x2 + 2x2 = 0

Combine like terms: 7 + -2 = 5
5 + 3x + 5x + -1x2 + 2x2 = 0

Combine like terms: 3x + 5x = 8x
5 + 8x + -1x2 + 2x2 = 0

Combine like terms: -1x2 + 2x2 = 1x2
5 + 8x + 1x2 = 0

Solving
5 + 8x + 1x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + 8x + -5 + x2 = 0 + -5

Reorder the terms:
5 + -5 + 8x + x2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 8x + x2 = 0 + -5
8x + x2 = 0 + -5

Combine like terms: 0 + -5 = -5
8x + x2 = -5

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = -5 + 16

Reorder the terms:
16 + 8x + x2 = -5 + 16

Combine like terms: -5 + 16 = 11
16 + 8x + x2 = 11

Factor a perfect square on the left side:
(x + 4)(x + 4) = 11

Calculate the square root of the right side: 3.31662479

Break this problem into two subproblems by setting 
(x + 4) equal to 3.31662479 and -3.31662479.

Subproblem 1

x + 4 = 3.31662479 Simplifying x + 4 = 3.31662479 Reorder the terms: 4 + x = 3.31662479 Solving 4 + x = 3.31662479 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 3.31662479 + -4 Combine like terms: 4 + -4 = 0 0 + x = 3.31662479 + -4 x = 3.31662479 + -4 Combine like terms: 3.31662479 + -4 = -0.68337521 x = -0.68337521 Simplifying x = -0.68337521

Subproblem 2

x + 4 = -3.31662479 Simplifying x + 4 = -3.31662479 Reorder the terms: 4 + x = -3.31662479 Solving 4 + x = -3.31662479 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -3.31662479 + -4 Combine like terms: 4 + -4 = 0 0 + x = -3.31662479 + -4 x = -3.31662479 + -4 Combine like terms: -3.31662479 + -4 = -7.31662479 x = -7.31662479 Simplifying x = -7.31662479

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.68337521, -7.31662479}

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