5(3x-4)-(x^2+2)-2x(x-3)=

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Solution for 5(3x-4)-(x^2+2)-2x(x-3)= equation:


Simplifying
5(3x + -4) + -1(x2 + 2) + -2x(x + -3) = 0

Reorder the terms:
5(-4 + 3x) + -1(x2 + 2) + -2x(x + -3) = 0
(-4 * 5 + 3x * 5) + -1(x2 + 2) + -2x(x + -3) = 0
(-20 + 15x) + -1(x2 + 2) + -2x(x + -3) = 0

Reorder the terms:
-20 + 15x + -1(2 + x2) + -2x(x + -3) = 0
-20 + 15x + (2 * -1 + x2 * -1) + -2x(x + -3) = 0
-20 + 15x + (-2 + -1x2) + -2x(x + -3) = 0

Reorder the terms:
-20 + 15x + -2 + -1x2 + -2x(-3 + x) = 0
-20 + 15x + -2 + -1x2 + (-3 * -2x + x * -2x) = 0
-20 + 15x + -2 + -1x2 + (6x + -2x2) = 0

Reorder the terms:
-20 + -2 + 15x + 6x + -1x2 + -2x2 = 0

Combine like terms: -20 + -2 = -22
-22 + 15x + 6x + -1x2 + -2x2 = 0

Combine like terms: 15x + 6x = 21x
-22 + 21x + -1x2 + -2x2 = 0

Combine like terms: -1x2 + -2x2 = -3x2
-22 + 21x + -3x2 = 0

Solving
-22 + 21x + -3x2 = 0

Solving for variable 'x'.

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

Divide each side by '-3'.
7.333333333 + -7x + x2 = 0

Move the constant term to the right:

Add '-7.333333333' to each side of the equation.
7.333333333 + -7x + -7.333333333 + x2 = 0 + -7.333333333

Reorder the terms:
7.333333333 + -7.333333333 + -7x + x2 = 0 + -7.333333333

Combine like terms: 7.333333333 + -7.333333333 = 0.000000000
0.000000000 + -7x + x2 = 0 + -7.333333333
-7x + x2 = 0 + -7.333333333

Combine like terms: 0 + -7.333333333 = -7.333333333
-7x + x2 = -7.333333333

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 = -7.333333333 + 12.25

Reorder the terms:
12.25 + -7x + x2 = -7.333333333 + 12.25

Combine like terms: -7.333333333 + 12.25 = 4.916666667
12.25 + -7x + x2 = 4.916666667

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 4.916666667

Calculate the square root of the right side: 2.217355783

Break this problem into two subproblems by setting 
(x + -3.5) equal to 2.217355783 and -2.217355783.

Subproblem 1

x + -3.5 = 2.217355783 Simplifying x + -3.5 = 2.217355783 Reorder the terms: -3.5 + x = 2.217355783 Solving -3.5 + x = 2.217355783 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 = 2.217355783 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 2.217355783 + 3.5 x = 2.217355783 + 3.5 Combine like terms: 2.217355783 + 3.5 = 5.717355783 x = 5.717355783 Simplifying x = 5.717355783

Subproblem 2

x + -3.5 = -2.217355783 Simplifying x + -3.5 = -2.217355783 Reorder the terms: -3.5 + x = -2.217355783 Solving -3.5 + x = -2.217355783 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 = -2.217355783 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -2.217355783 + 3.5 x = -2.217355783 + 3.5 Combine like terms: -2.217355783 + 3.5 = 1.282644217 x = 1.282644217 Simplifying x = 1.282644217

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.717355783, 1.282644217}

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