x^2-4x=3x-2+28

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Solution for x^2-4x=3x-2+28 equation:


Simplifying
x2 + -4x = 3x + -2 + 28

Reorder the terms:
-4x + x2 = 3x + -2 + 28

Reorder the terms:
-4x + x2 = -2 + 28 + 3x

Combine like terms: -2 + 28 = 26
-4x + x2 = 26 + 3x

Solving
-4x + x2 = 26 + 3x

Solving for variable 'x'.

Reorder the terms:
-26 + -4x + -3x + x2 = 26 + 3x + -26 + -3x

Combine like terms: -4x + -3x = -7x
-26 + -7x + x2 = 26 + 3x + -26 + -3x

Reorder the terms:
-26 + -7x + x2 = 26 + -26 + 3x + -3x

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

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

Begin completing the square.

Move the constant term to the right:

Add '26' to each side of the equation.
-26 + -7x + 26 + x2 = 0 + 26

Reorder the terms:
-26 + 26 + -7x + x2 = 0 + 26

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

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

The x term is -7x.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7x + 12.25 + x2 = 26 + 12.25

Reorder the terms:
12.25 + -7x + x2 = 26 + 12.25

Combine like terms: 26 + 12.25 = 38.25
12.25 + -7x + x2 = 38.25

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 38.25

Calculate the square root of the right side: 6.184658438

Break this problem into two subproblems by setting 
(x + -3.5) equal to 6.184658438 and -6.184658438.

Subproblem 1

x + -3.5 = 6.184658438 Simplifying x + -3.5 = 6.184658438 Reorder the terms: -3.5 + x = 6.184658438 Solving -3.5 + x = 6.184658438 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = 6.184658438 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 6.184658438 + 3.5 x = 6.184658438 + 3.5 Combine like terms: 6.184658438 + 3.5 = 9.684658438 x = 9.684658438 Simplifying x = 9.684658438

Subproblem 2

x + -3.5 = -6.184658438 Simplifying x + -3.5 = -6.184658438 Reorder the terms: -3.5 + x = -6.184658438 Solving -3.5 + x = -6.184658438 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = -6.184658438 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -6.184658438 + 3.5 x = -6.184658438 + 3.5 Combine like terms: -6.184658438 + 3.5 = -2.684658438 x = -2.684658438 Simplifying x = -2.684658438

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.684658438, -2.684658438}

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