3x(x-1)=2(x+27)

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Solution for 3x(x-1)=2(x+27) equation:


Simplifying
3x(x + -1) = 2(x + 27)

Reorder the terms:
3x(-1 + x) = 2(x + 27)
(-1 * 3x + x * 3x) = 2(x + 27)
(-3x + 3x2) = 2(x + 27)

Reorder the terms:
-3x + 3x2 = 2(27 + x)
-3x + 3x2 = (27 * 2 + x * 2)
-3x + 3x2 = (54 + 2x)

Solving
-3x + 3x2 = 54 + 2x

Solving for variable 'x'.

Reorder the terms:
-54 + -3x + -2x + 3x2 = 54 + 2x + -54 + -2x

Combine like terms: -3x + -2x = -5x
-54 + -5x + 3x2 = 54 + 2x + -54 + -2x

Reorder the terms:
-54 + -5x + 3x2 = 54 + -54 + 2x + -2x

Combine like terms: 54 + -54 = 0
-54 + -5x + 3x2 = 0 + 2x + -2x
-54 + -5x + 3x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-54 + -5x + 3x2 = 0

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

Divide each side by '3'.
-18 + -1.666666667x + x2 = 0

Move the constant term to the right:

Add '18' to each side of the equation.
-18 + -1.666666667x + 18 + x2 = 0 + 18

Reorder the terms:
-18 + 18 + -1.666666667x + x2 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + -1.666666667x + x2 = 0 + 18
-1.666666667x + x2 = 0 + 18

Combine like terms: 0 + 18 = 18
-1.666666667x + x2 = 18

The x term is -1.666666667x.  Take half its coefficient (-0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
-1.666666667x + 0.6944444447 + x2 = 18 + 0.6944444447

Reorder the terms:
0.6944444447 + -1.666666667x + x2 = 18 + 0.6944444447

Combine like terms: 18 + 0.6944444447 = 18.6944444447
0.6944444447 + -1.666666667x + x2 = 18.6944444447

Factor a perfect square on the left side:
(x + -0.8333333335)(x + -0.8333333335) = 18.6944444447

Calculate the square root of the right side: 4.323707257

Break this problem into two subproblems by setting 
(x + -0.8333333335) equal to 4.323707257 and -4.323707257.

Subproblem 1

x + -0.8333333335 = 4.323707257 Simplifying x + -0.8333333335 = 4.323707257 Reorder the terms: -0.8333333335 + x = 4.323707257 Solving -0.8333333335 + x = 4.323707257 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + x = 4.323707257 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + x = 4.323707257 + 0.8333333335 x = 4.323707257 + 0.8333333335 Combine like terms: 4.323707257 + 0.8333333335 = 5.1570405905 x = 5.1570405905 Simplifying x = 5.1570405905

Subproblem 2

x + -0.8333333335 = -4.323707257 Simplifying x + -0.8333333335 = -4.323707257 Reorder the terms: -0.8333333335 + x = -4.323707257 Solving -0.8333333335 + x = -4.323707257 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + x = -4.323707257 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + x = -4.323707257 + 0.8333333335 x = -4.323707257 + 0.8333333335 Combine like terms: -4.323707257 + 0.8333333335 = -3.4903739235 x = -3.4903739235 Simplifying x = -3.4903739235

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.1570405905, -3.4903739235}

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