(8x^2-3x-3)+(3x^2-5x-4)=

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Solution for (8x^2-3x-3)+(3x^2-5x-4)= equation:


Simplifying
(8x2 + -3x + -3) + (3x2 + -5x + -4) = 0

Reorder the terms:
(-3 + -3x + 8x2) + (3x2 + -5x + -4) = 0

Remove parenthesis around (-3 + -3x + 8x2)
-3 + -3x + 8x2 + (3x2 + -5x + -4) = 0

Reorder the terms:
-3 + -3x + 8x2 + (-4 + -5x + 3x2) = 0

Remove parenthesis around (-4 + -5x + 3x2)
-3 + -3x + 8x2 + -4 + -5x + 3x2 = 0

Reorder the terms:
-3 + -4 + -3x + -5x + 8x2 + 3x2 = 0

Combine like terms: -3 + -4 = -7
-7 + -3x + -5x + 8x2 + 3x2 = 0

Combine like terms: -3x + -5x = -8x
-7 + -8x + 8x2 + 3x2 = 0

Combine like terms: 8x2 + 3x2 = 11x2
-7 + -8x + 11x2 = 0

Solving
-7 + -8x + 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'.
-0.6363636364 + -0.7272727273x + x2 = 0

Move the constant term to the right:

Add '0.6363636364' to each side of the equation.
-0.6363636364 + -0.7272727273x + 0.6363636364 + x2 = 0 + 0.6363636364

Reorder the terms:
-0.6363636364 + 0.6363636364 + -0.7272727273x + x2 = 0 + 0.6363636364

Combine like terms: -0.6363636364 + 0.6363636364 = 0.0000000000
0.0000000000 + -0.7272727273x + x2 = 0 + 0.6363636364
-0.7272727273x + x2 = 0 + 0.6363636364

Combine like terms: 0 + 0.6363636364 = 0.6363636364
-0.7272727273x + x2 = 0.6363636364

The x term is -0.7272727273x.  Take half its coefficient (-0.3636363637).
Square it (0.1322314050) and add it to both sides.

Add '0.1322314050' to each side of the equation.
-0.7272727273x + 0.1322314050 + x2 = 0.6363636364 + 0.1322314050

Reorder the terms:
0.1322314050 + -0.7272727273x + x2 = 0.6363636364 + 0.1322314050

Combine like terms: 0.6363636364 + 0.1322314050 = 0.7685950414
0.1322314050 + -0.7272727273x + x2 = 0.7685950414

Factor a perfect square on the left side:
(x + -0.3636363637)(x + -0.3636363637) = 0.7685950414

Calculate the square root of the right side: 0.876695524

Break this problem into two subproblems by setting 
(x + -0.3636363637) equal to 0.876695524 and -0.876695524.

Subproblem 1

x + -0.3636363637 = 0.876695524 Simplifying x + -0.3636363637 = 0.876695524 Reorder the terms: -0.3636363637 + x = 0.876695524 Solving -0.3636363637 + x = 0.876695524 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3636363637' to each side of the equation. -0.3636363637 + 0.3636363637 + x = 0.876695524 + 0.3636363637 Combine like terms: -0.3636363637 + 0.3636363637 = 0.0000000000 0.0000000000 + x = 0.876695524 + 0.3636363637 x = 0.876695524 + 0.3636363637 Combine like terms: 0.876695524 + 0.3636363637 = 1.2403318877 x = 1.2403318877 Simplifying x = 1.2403318877

Subproblem 2

x + -0.3636363637 = -0.876695524 Simplifying x + -0.3636363637 = -0.876695524 Reorder the terms: -0.3636363637 + x = -0.876695524 Solving -0.3636363637 + x = -0.876695524 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3636363637' to each side of the equation. -0.3636363637 + 0.3636363637 + x = -0.876695524 + 0.3636363637 Combine like terms: -0.3636363637 + 0.3636363637 = 0.0000000000 0.0000000000 + x = -0.876695524 + 0.3636363637 x = -0.876695524 + 0.3636363637 Combine like terms: -0.876695524 + 0.3636363637 = -0.5130591603 x = -0.5130591603 Simplifying x = -0.5130591603

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.2403318877, -0.5130591603}

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