4x^2-15x+5=7x+2

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Solution for 4x^2-15x+5=7x+2 equation:


Simplifying
4x2 + -15x + 5 = 7x + 2

Reorder the terms:
5 + -15x + 4x2 = 7x + 2

Reorder the terms:
5 + -15x + 4x2 = 2 + 7x

Solving
5 + -15x + 4x2 = 2 + 7x

Solving for variable 'x'.

Reorder the terms:
5 + -2 + -15x + -7x + 4x2 = 2 + 7x + -2 + -7x

Combine like terms: 5 + -2 = 3
3 + -15x + -7x + 4x2 = 2 + 7x + -2 + -7x

Combine like terms: -15x + -7x = -22x
3 + -22x + 4x2 = 2 + 7x + -2 + -7x

Reorder the terms:
3 + -22x + 4x2 = 2 + -2 + 7x + -7x

Combine like terms: 2 + -2 = 0
3 + -22x + 4x2 = 0 + 7x + -7x
3 + -22x + 4x2 = 7x + -7x

Combine like terms: 7x + -7x = 0
3 + -22x + 4x2 = 0

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

Divide each side by '4'.
0.75 + -5.5x + x2 = 0

Move the constant term to the right:

Add '-0.75' to each side of the equation.
0.75 + -5.5x + -0.75 + x2 = 0 + -0.75

Reorder the terms:
0.75 + -0.75 + -5.5x + x2 = 0 + -0.75

Combine like terms: 0.75 + -0.75 = 0.00
0.00 + -5.5x + x2 = 0 + -0.75
-5.5x + x2 = 0 + -0.75

Combine like terms: 0 + -0.75 = -0.75
-5.5x + x2 = -0.75

The x term is -5.5x.  Take half its coefficient (-2.75).
Square it (7.5625) and add it to both sides.

Add '7.5625' to each side of the equation.
-5.5x + 7.5625 + x2 = -0.75 + 7.5625

Reorder the terms:
7.5625 + -5.5x + x2 = -0.75 + 7.5625

Combine like terms: -0.75 + 7.5625 = 6.8125
7.5625 + -5.5x + x2 = 6.8125

Factor a perfect square on the left side:
(x + -2.75)(x + -2.75) = 6.8125

Calculate the square root of the right side: 2.610076627

Break this problem into two subproblems by setting 
(x + -2.75) equal to 2.610076627 and -2.610076627.

Subproblem 1

x + -2.75 = 2.610076627 Simplifying x + -2.75 = 2.610076627 Reorder the terms: -2.75 + x = 2.610076627 Solving -2.75 + x = 2.610076627 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + x = 2.610076627 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + x = 2.610076627 + 2.75 x = 2.610076627 + 2.75 Combine like terms: 2.610076627 + 2.75 = 5.360076627 x = 5.360076627 Simplifying x = 5.360076627

Subproblem 2

x + -2.75 = -2.610076627 Simplifying x + -2.75 = -2.610076627 Reorder the terms: -2.75 + x = -2.610076627 Solving -2.75 + x = -2.610076627 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + x = -2.610076627 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + x = -2.610076627 + 2.75 x = -2.610076627 + 2.75 Combine like terms: -2.610076627 + 2.75 = 0.139923373 x = 0.139923373 Simplifying x = 0.139923373

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.360076627, 0.139923373}

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