(2x^2-3x+7)-(5x^2+3x+6)=

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Solution for (2x^2-3x+7)-(5x^2+3x+6)= equation:


Simplifying
(2x2 + -3x + 7) + -1(5x2 + 3x + 6) = 0

Reorder the terms:
(7 + -3x + 2x2) + -1(5x2 + 3x + 6) = 0

Remove parenthesis around (7 + -3x + 2x2)
7 + -3x + 2x2 + -1(5x2 + 3x + 6) = 0

Reorder the terms:
7 + -3x + 2x2 + -1(6 + 3x + 5x2) = 0
7 + -3x + 2x2 + (6 * -1 + 3x * -1 + 5x2 * -1) = 0
7 + -3x + 2x2 + (-6 + -3x + -5x2) = 0

Reorder the terms:
7 + -6 + -3x + -3x + 2x2 + -5x2 = 0

Combine like terms: 7 + -6 = 1
1 + -3x + -3x + 2x2 + -5x2 = 0

Combine like terms: -3x + -3x = -6x
1 + -6x + 2x2 + -5x2 = 0

Combine like terms: 2x2 + -5x2 = -3x2
1 + -6x + -3x2 = 0

Solving
1 + -6x + -3x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-0.3333333333 + 2x + x2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + 2x + 0.3333333333 + x2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + 2x + x2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + 2x + x2 = 0 + 0.3333333333
2x + x2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
2x + x2 = 0.3333333333

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 0.3333333333 + 1

Reorder the terms:
1 + 2x + x2 = 0.3333333333 + 1

Combine like terms: 0.3333333333 + 1 = 1.3333333333
1 + 2x + x2 = 1.3333333333

Factor a perfect square on the left side:
(x + 1)(x + 1) = 1.3333333333

Calculate the square root of the right side: 1.154700538

Break this problem into two subproblems by setting 
(x + 1) equal to 1.154700538 and -1.154700538.

Subproblem 1

x + 1 = 1.154700538 Simplifying x + 1 = 1.154700538 Reorder the terms: 1 + x = 1.154700538 Solving 1 + x = 1.154700538 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.154700538 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.154700538 + -1 x = 1.154700538 + -1 Combine like terms: 1.154700538 + -1 = 0.154700538 x = 0.154700538 Simplifying x = 0.154700538

Subproblem 2

x + 1 = -1.154700538 Simplifying x + 1 = -1.154700538 Reorder the terms: 1 + x = -1.154700538 Solving 1 + x = -1.154700538 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.154700538 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.154700538 + -1 x = -1.154700538 + -1 Combine like terms: -1.154700538 + -1 = -2.154700538 x = -2.154700538 Simplifying x = -2.154700538

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.154700538, -2.154700538}

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