180=(3x+17)(.5x-5)

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Solution for 180=(3x+17)(.5x-5) equation:


Simplifying
180 = (3x + 17)(0.5x + -5)

Reorder the terms:
180 = (17 + 3x)(0.5x + -5)

Reorder the terms:
180 = (17 + 3x)(-5 + 0.5x)

Multiply (17 + 3x) * (-5 + 0.5x)
180 = (17(-5 + 0.5x) + 3x * (-5 + 0.5x))
180 = ((-5 * 17 + 0.5x * 17) + 3x * (-5 + 0.5x))
180 = ((-85 + 8.5x) + 3x * (-5 + 0.5x))
180 = (-85 + 8.5x + (-5 * 3x + 0.5x * 3x))
180 = (-85 + 8.5x + (-15x + 1.5x2))

Combine like terms: 8.5x + -15x = -6.5x
180 = (-85 + -6.5x + 1.5x2)

Solving
180 = -85 + -6.5x + 1.5x2

Solving for variable 'x'.

Combine like terms: 180 + 85 = 265
265 + 6.5x + -1.5x2 = -85 + -6.5x + 1.5x2 + 85 + 6.5x + -1.5x2

Reorder the terms:
265 + 6.5x + -1.5x2 = -85 + 85 + -6.5x + 6.5x + 1.5x2 + -1.5x2

Combine like terms: -85 + 85 = 0
265 + 6.5x + -1.5x2 = 0 + -6.5x + 6.5x + 1.5x2 + -1.5x2
265 + 6.5x + -1.5x2 = -6.5x + 6.5x + 1.5x2 + -1.5x2

Combine like terms: -6.5x + 6.5x = 0.0
265 + 6.5x + -1.5x2 = 0.0 + 1.5x2 + -1.5x2
265 + 6.5x + -1.5x2 = 1.5x2 + -1.5x2

Combine like terms: 1.5x2 + -1.5x2 = 0.0
265 + 6.5x + -1.5x2 = 0.0

Begin completing the square.  Divide all terms by
-1.5 the coefficient of the squared term: 

Divide each side by '-1.5'.
-176.6666667 + -4.333333333x + x2 = 0

Move the constant term to the right:

Add '176.6666667' to each side of the equation.
-176.6666667 + -4.333333333x + 176.6666667 + x2 = 0 + 176.6666667

Reorder the terms:
-176.6666667 + 176.6666667 + -4.333333333x + x2 = 0 + 176.6666667

Combine like terms: -176.6666667 + 176.6666667 = 0.0000000
0.0000000 + -4.333333333x + x2 = 0 + 176.6666667
-4.333333333x + x2 = 0 + 176.6666667

Combine like terms: 0 + 176.6666667 = 176.6666667
-4.333333333x + x2 = 176.6666667

The x term is -4.333333333x.  Take half its coefficient (-2.166666667).
Square it (4.694444446) and add it to both sides.

Add '4.694444446' to each side of the equation.
-4.333333333x + 4.694444446 + x2 = 176.6666667 + 4.694444446

Reorder the terms:
4.694444446 + -4.333333333x + x2 = 176.6666667 + 4.694444446

Combine like terms: 176.6666667 + 4.694444446 = 181.361111146
4.694444446 + -4.333333333x + x2 = 181.361111146

Factor a perfect square on the left side:
(x + -2.166666667)(x + -2.166666667) = 181.361111146

Calculate the square root of the right side: 13.46703795

Break this problem into two subproblems by setting 
(x + -2.166666667) equal to 13.46703795 and -13.46703795.

Subproblem 1

x + -2.166666667 = 13.46703795 Simplifying x + -2.166666667 = 13.46703795 Reorder the terms: -2.166666667 + x = 13.46703795 Solving -2.166666667 + x = 13.46703795 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.166666667' to each side of the equation. -2.166666667 + 2.166666667 + x = 13.46703795 + 2.166666667 Combine like terms: -2.166666667 + 2.166666667 = 0.000000000 0.000000000 + x = 13.46703795 + 2.166666667 x = 13.46703795 + 2.166666667 Combine like terms: 13.46703795 + 2.166666667 = 15.633704617 x = 15.633704617 Simplifying x = 15.633704617

Subproblem 2

x + -2.166666667 = -13.46703795 Simplifying x + -2.166666667 = -13.46703795 Reorder the terms: -2.166666667 + x = -13.46703795 Solving -2.166666667 + x = -13.46703795 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.166666667' to each side of the equation. -2.166666667 + 2.166666667 + x = -13.46703795 + 2.166666667 Combine like terms: -2.166666667 + 2.166666667 = 0.000000000 0.000000000 + x = -13.46703795 + 2.166666667 x = -13.46703795 + 2.166666667 Combine like terms: -13.46703795 + 2.166666667 = -11.300371283 x = -11.300371283 Simplifying x = -11.300371283

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.633704617, -11.300371283}

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