174=x(x-4)

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Solution for 174=x(x-4) equation:


Simplifying
174 = x(x + -4)

Reorder the terms:
174 = x(-4 + x)
174 = (-4 * x + x * x)
174 = (-4x + x2)

Solving
174 = -4x + x2

Solving for variable 'x'.

Reorder the terms:
174 + 4x + -1x2 = -4x + 4x + x2 + -1x2

Combine like terms: -4x + 4x = 0
174 + 4x + -1x2 = 0 + x2 + -1x2
174 + 4x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
174 + 4x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-174 + -4x + x2 = 0

Move the constant term to the right:

Add '174' to each side of the equation.
-174 + -4x + 174 + x2 = 0 + 174

Reorder the terms:
-174 + 174 + -4x + x2 = 0 + 174

Combine like terms: -174 + 174 = 0
0 + -4x + x2 = 0 + 174
-4x + x2 = 0 + 174

Combine like terms: 0 + 174 = 174
-4x + x2 = 174

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = 174 + 4

Reorder the terms:
4 + -4x + x2 = 174 + 4

Combine like terms: 174 + 4 = 178
4 + -4x + x2 = 178

Factor a perfect square on the left side:
(x + -2)(x + -2) = 178

Calculate the square root of the right side: 13.341664064

Break this problem into two subproblems by setting 
(x + -2) equal to 13.341664064 and -13.341664064.

Subproblem 1

x + -2 = 13.341664064 Simplifying x + -2 = 13.341664064 Reorder the terms: -2 + x = 13.341664064 Solving -2 + x = 13.341664064 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 13.341664064 + 2 Combine like terms: -2 + 2 = 0 0 + x = 13.341664064 + 2 x = 13.341664064 + 2 Combine like terms: 13.341664064 + 2 = 15.341664064 x = 15.341664064 Simplifying x = 15.341664064

Subproblem 2

x + -2 = -13.341664064 Simplifying x + -2 = -13.341664064 Reorder the terms: -2 + x = -13.341664064 Solving -2 + x = -13.341664064 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -13.341664064 + 2 Combine like terms: -2 + 2 = 0 0 + x = -13.341664064 + 2 x = -13.341664064 + 2 Combine like terms: -13.341664064 + 2 = -11.341664064 x = -11.341664064 Simplifying x = -11.341664064

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.341664064, -11.341664064}

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