2x(x-7)+3(x-1)=4x+3

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Solution for 2x(x-7)+3(x-1)=4x+3 equation:


Simplifying
2x(x + -7) + 3(x + -1) = 4x + 3

Reorder the terms:
2x(-7 + x) + 3(x + -1) = 4x + 3
(-7 * 2x + x * 2x) + 3(x + -1) = 4x + 3
(-14x + 2x2) + 3(x + -1) = 4x + 3

Reorder the terms:
-14x + 2x2 + 3(-1 + x) = 4x + 3
-14x + 2x2 + (-1 * 3 + x * 3) = 4x + 3
-14x + 2x2 + (-3 + 3x) = 4x + 3

Reorder the terms:
-3 + -14x + 3x + 2x2 = 4x + 3

Combine like terms: -14x + 3x = -11x
-3 + -11x + 2x2 = 4x + 3

Reorder the terms:
-3 + -11x + 2x2 = 3 + 4x

Solving
-3 + -11x + 2x2 = 3 + 4x

Solving for variable 'x'.

Reorder the terms:
-3 + -3 + -11x + -4x + 2x2 = 3 + 4x + -3 + -4x

Combine like terms: -3 + -3 = -6
-6 + -11x + -4x + 2x2 = 3 + 4x + -3 + -4x

Combine like terms: -11x + -4x = -15x
-6 + -15x + 2x2 = 3 + 4x + -3 + -4x

Reorder the terms:
-6 + -15x + 2x2 = 3 + -3 + 4x + -4x

Combine like terms: 3 + -3 = 0
-6 + -15x + 2x2 = 0 + 4x + -4x
-6 + -15x + 2x2 = 4x + -4x

Combine like terms: 4x + -4x = 0
-6 + -15x + 2x2 = 0

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

Divide each side by '2'.
-3 + -7.5x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -7.5x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + -7.5x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -7.5x + x2 = 0 + 3
-7.5x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
-7.5x + x2 = 3

The x term is -7.5x.  Take half its coefficient (-3.75).
Square it (14.0625) and add it to both sides.

Add '14.0625' to each side of the equation.
-7.5x + 14.0625 + x2 = 3 + 14.0625

Reorder the terms:
14.0625 + -7.5x + x2 = 3 + 14.0625

Combine like terms: 3 + 14.0625 = 17.0625
14.0625 + -7.5x + x2 = 17.0625

Factor a perfect square on the left side:
(x + -3.75)(x + -3.75) = 17.0625

Calculate the square root of the right side: 4.13067791

Break this problem into two subproblems by setting 
(x + -3.75) equal to 4.13067791 and -4.13067791.

Subproblem 1

x + -3.75 = 4.13067791 Simplifying x + -3.75 = 4.13067791 Reorder the terms: -3.75 + x = 4.13067791 Solving -3.75 + x = 4.13067791 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + x = 4.13067791 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + x = 4.13067791 + 3.75 x = 4.13067791 + 3.75 Combine like terms: 4.13067791 + 3.75 = 7.88067791 x = 7.88067791 Simplifying x = 7.88067791

Subproblem 2

x + -3.75 = -4.13067791 Simplifying x + -3.75 = -4.13067791 Reorder the terms: -3.75 + x = -4.13067791 Solving -3.75 + x = -4.13067791 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + x = -4.13067791 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + x = -4.13067791 + 3.75 x = -4.13067791 + 3.75 Combine like terms: -4.13067791 + 3.75 = -0.38067791 x = -0.38067791 Simplifying x = -0.38067791

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.88067791, -0.38067791}

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