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

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


Simplifying
-1(4x + 2)(-3x + -5) = 3

Reorder the terms:
-1(2 + 4x)(-3x + -5) = 3

Reorder the terms:
-1(2 + 4x)(-5 + -3x) = 3

Multiply (2 + 4x) * (-5 + -3x)
-1(2(-5 + -3x) + 4x * (-5 + -3x)) = 3
-1((-5 * 2 + -3x * 2) + 4x * (-5 + -3x)) = 3
-1((-10 + -6x) + 4x * (-5 + -3x)) = 3
-1(-10 + -6x + (-5 * 4x + -3x * 4x)) = 3
-1(-10 + -6x + (-20x + -12x2)) = 3

Combine like terms: -6x + -20x = -26x
-1(-10 + -26x + -12x2) = 3
(-10 * -1 + -26x * -1 + -12x2 * -1) = 3
(10 + 26x + 12x2) = 3

Solving
10 + 26x + 12x2 = 3

Solving for variable 'x'.

Reorder the terms:
10 + -3 + 26x + 12x2 = 3 + -3

Combine like terms: 10 + -3 = 7
7 + 26x + 12x2 = 3 + -3

Combine like terms: 3 + -3 = 0
7 + 26x + 12x2 = 0

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

Divide each side by '12'.
0.5833333333 + 2.166666667x + x2 = 0

Move the constant term to the right:

Add '-0.5833333333' to each side of the equation.
0.5833333333 + 2.166666667x + -0.5833333333 + x2 = 0 + -0.5833333333

Reorder the terms:
0.5833333333 + -0.5833333333 + 2.166666667x + x2 = 0 + -0.5833333333

Combine like terms: 0.5833333333 + -0.5833333333 = 0.0000000000
0.0000000000 + 2.166666667x + x2 = 0 + -0.5833333333
2.166666667x + x2 = 0 + -0.5833333333

Combine like terms: 0 + -0.5833333333 = -0.5833333333
2.166666667x + x2 = -0.5833333333

The x term is 2.166666667x.  Take half its coefficient (1.083333334).
Square it (1.173611113) and add it to both sides.

Add '1.173611113' to each side of the equation.
2.166666667x + 1.173611113 + x2 = -0.5833333333 + 1.173611113

Reorder the terms:
1.173611113 + 2.166666667x + x2 = -0.5833333333 + 1.173611113

Combine like terms: -0.5833333333 + 1.173611113 = 0.5902777797
1.173611113 + 2.166666667x + x2 = 0.5902777797

Factor a perfect square on the left side:
(x + 1.083333334)(x + 1.083333334) = 0.5902777797

Calculate the square root of the right side: 0.768295373

Break this problem into two subproblems by setting 
(x + 1.083333334) equal to 0.768295373 and -0.768295373.

Subproblem 1

x + 1.083333334 = 0.768295373 Simplifying x + 1.083333334 = 0.768295373 Reorder the terms: 1.083333334 + x = 0.768295373 Solving 1.083333334 + x = 0.768295373 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.083333334' to each side of the equation. 1.083333334 + -1.083333334 + x = 0.768295373 + -1.083333334 Combine like terms: 1.083333334 + -1.083333334 = 0.000000000 0.000000000 + x = 0.768295373 + -1.083333334 x = 0.768295373 + -1.083333334 Combine like terms: 0.768295373 + -1.083333334 = -0.315037961 x = -0.315037961 Simplifying x = -0.315037961

Subproblem 2

x + 1.083333334 = -0.768295373 Simplifying x + 1.083333334 = -0.768295373 Reorder the terms: 1.083333334 + x = -0.768295373 Solving 1.083333334 + x = -0.768295373 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.083333334' to each side of the equation. 1.083333334 + -1.083333334 + x = -0.768295373 + -1.083333334 Combine like terms: 1.083333334 + -1.083333334 = 0.000000000 0.000000000 + x = -0.768295373 + -1.083333334 x = -0.768295373 + -1.083333334 Combine like terms: -0.768295373 + -1.083333334 = -1.851628707 x = -1.851628707 Simplifying x = -1.851628707

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.315037961, -1.851628707}

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