(3x+4)(5x-7)=(2x+7)+53

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Solution for (3x+4)(5x-7)=(2x+7)+53 equation:


Simplifying
(3x + 4)(5x + -7) = (2x + 7) + 53

Reorder the terms:
(4 + 3x)(5x + -7) = (2x + 7) + 53

Reorder the terms:
(4 + 3x)(-7 + 5x) = (2x + 7) + 53

Multiply (4 + 3x) * (-7 + 5x)
(4(-7 + 5x) + 3x * (-7 + 5x)) = (2x + 7) + 53
((-7 * 4 + 5x * 4) + 3x * (-7 + 5x)) = (2x + 7) + 53
((-28 + 20x) + 3x * (-7 + 5x)) = (2x + 7) + 53
(-28 + 20x + (-7 * 3x + 5x * 3x)) = (2x + 7) + 53
(-28 + 20x + (-21x + 15x2)) = (2x + 7) + 53

Combine like terms: 20x + -21x = -1x
(-28 + -1x + 15x2) = (2x + 7) + 53

Reorder the terms:
-28 + -1x + 15x2 = (7 + 2x) + 53

Remove parenthesis around (7 + 2x)
-28 + -1x + 15x2 = 7 + 2x + 53

Reorder the terms:
-28 + -1x + 15x2 = 7 + 53 + 2x

Combine like terms: 7 + 53 = 60
-28 + -1x + 15x2 = 60 + 2x

Solving
-28 + -1x + 15x2 = 60 + 2x

Solving for variable 'x'.

Reorder the terms:
-28 + -60 + -1x + -2x + 15x2 = 60 + 2x + -60 + -2x

Combine like terms: -28 + -60 = -88
-88 + -1x + -2x + 15x2 = 60 + 2x + -60 + -2x

Combine like terms: -1x + -2x = -3x
-88 + -3x + 15x2 = 60 + 2x + -60 + -2x

Reorder the terms:
-88 + -3x + 15x2 = 60 + -60 + 2x + -2x

Combine like terms: 60 + -60 = 0
-88 + -3x + 15x2 = 0 + 2x + -2x
-88 + -3x + 15x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-88 + -3x + 15x2 = 0

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

Divide each side by '15'.
-5.866666667 + -0.2x + x2 = 0

Move the constant term to the right:

Add '5.866666667' to each side of the equation.
-5.866666667 + -0.2x + 5.866666667 + x2 = 0 + 5.866666667

Reorder the terms:
-5.866666667 + 5.866666667 + -0.2x + x2 = 0 + 5.866666667

Combine like terms: -5.866666667 + 5.866666667 = 0.000000000
0.000000000 + -0.2x + x2 = 0 + 5.866666667
-0.2x + x2 = 0 + 5.866666667

Combine like terms: 0 + 5.866666667 = 5.866666667
-0.2x + x2 = 5.866666667

The x term is -0.2x.  Take half its coefficient (-0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
-0.2x + 0.01 + x2 = 5.866666667 + 0.01

Reorder the terms:
0.01 + -0.2x + x2 = 5.866666667 + 0.01

Combine like terms: 5.866666667 + 0.01 = 5.876666667
0.01 + -0.2x + x2 = 5.876666667

Factor a perfect square on the left side:
(x + -0.1)(x + -0.1) = 5.876666667

Calculate the square root of the right side: 2.424183711

Break this problem into two subproblems by setting 
(x + -0.1) equal to 2.424183711 and -2.424183711.

Subproblem 1

x + -0.1 = 2.424183711 Simplifying x + -0.1 = 2.424183711 Reorder the terms: -0.1 + x = 2.424183711 Solving -0.1 + x = 2.424183711 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + x = 2.424183711 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + x = 2.424183711 + 0.1 x = 2.424183711 + 0.1 Combine like terms: 2.424183711 + 0.1 = 2.524183711 x = 2.524183711 Simplifying x = 2.524183711

Subproblem 2

x + -0.1 = -2.424183711 Simplifying x + -0.1 = -2.424183711 Reorder the terms: -0.1 + x = -2.424183711 Solving -0.1 + x = -2.424183711 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + x = -2.424183711 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + x = -2.424183711 + 0.1 x = -2.424183711 + 0.1 Combine like terms: -2.424183711 + 0.1 = -2.324183711 x = -2.324183711 Simplifying x = -2.324183711

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.524183711, -2.324183711}

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