(7x^2-2x-63)+(6x^2+4x)=

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Solution for (7x^2-2x-63)+(6x^2+4x)= equation:


Simplifying
(7x2 + -2x + -63) + (6x2 + 4x) = 0

Reorder the terms:
(-63 + -2x + 7x2) + (6x2 + 4x) = 0

Remove parenthesis around (-63 + -2x + 7x2)
-63 + -2x + 7x2 + (6x2 + 4x) = 0

Reorder the terms:
-63 + -2x + 7x2 + (4x + 6x2) = 0

Remove parenthesis around (4x + 6x2)
-63 + -2x + 7x2 + 4x + 6x2 = 0

Reorder the terms:
-63 + -2x + 4x + 7x2 + 6x2 = 0

Combine like terms: -2x + 4x = 2x
-63 + 2x + 7x2 + 6x2 = 0

Combine like terms: 7x2 + 6x2 = 13x2
-63 + 2x + 13x2 = 0

Solving
-63 + 2x + 13x2 = 0

Solving for variable 'x'.

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

Divide each side by '13'.
-4.846153846 + 0.1538461538x + x2 = 0

Move the constant term to the right:

Add '4.846153846' to each side of the equation.
-4.846153846 + 0.1538461538x + 4.846153846 + x2 = 0 + 4.846153846

Reorder the terms:
-4.846153846 + 4.846153846 + 0.1538461538x + x2 = 0 + 4.846153846

Combine like terms: -4.846153846 + 4.846153846 = 0.000000000
0.000000000 + 0.1538461538x + x2 = 0 + 4.846153846
0.1538461538x + x2 = 0 + 4.846153846

Combine like terms: 0 + 4.846153846 = 4.846153846
0.1538461538x + x2 = 4.846153846

The x term is 0.1538461538x.  Take half its coefficient (0.0769230769).
Square it (0.005917159760) and add it to both sides.

Add '0.005917159760' to each side of the equation.
0.1538461538x + 0.005917159760 + x2 = 4.846153846 + 0.005917159760

Reorder the terms:
0.005917159760 + 0.1538461538x + x2 = 4.846153846 + 0.005917159760

Combine like terms: 4.846153846 + 0.005917159760 = 4.85207100576
0.005917159760 + 0.1538461538x + x2 = 4.85207100576

Factor a perfect square on the left side:
(x + 0.0769230769)(x + 0.0769230769) = 4.85207100576

Calculate the square root of the right side: 2.202741702

Break this problem into two subproblems by setting 
(x + 0.0769230769) equal to 2.202741702 and -2.202741702.

Subproblem 1

x + 0.0769230769 = 2.202741702 Simplifying x + 0.0769230769 = 2.202741702 Reorder the terms: 0.0769230769 + x = 2.202741702 Solving 0.0769230769 + x = 2.202741702 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0769230769' to each side of the equation. 0.0769230769 + -0.0769230769 + x = 2.202741702 + -0.0769230769 Combine like terms: 0.0769230769 + -0.0769230769 = 0.0000000000 0.0000000000 + x = 2.202741702 + -0.0769230769 x = 2.202741702 + -0.0769230769 Combine like terms: 2.202741702 + -0.0769230769 = 2.1258186251 x = 2.1258186251 Simplifying x = 2.1258186251

Subproblem 2

x + 0.0769230769 = -2.202741702 Simplifying x + 0.0769230769 = -2.202741702 Reorder the terms: 0.0769230769 + x = -2.202741702 Solving 0.0769230769 + x = -2.202741702 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0769230769' to each side of the equation. 0.0769230769 + -0.0769230769 + x = -2.202741702 + -0.0769230769 Combine like terms: 0.0769230769 + -0.0769230769 = 0.0000000000 0.0000000000 + x = -2.202741702 + -0.0769230769 x = -2.202741702 + -0.0769230769 Combine like terms: -2.202741702 + -0.0769230769 = -2.2796647789 x = -2.2796647789 Simplifying x = -2.2796647789

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.1258186251, -2.2796647789}

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