3x^2=2(3x+10)

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Solution for 3x^2=2(3x+10) equation:


Simplifying
3x2 = 2(3x + 10)

Reorder the terms:
3x2 = 2(10 + 3x)
3x2 = (10 * 2 + 3x * 2)
3x2 = (20 + 6x)

Solving
3x2 = 20 + 6x

Solving for variable 'x'.

Reorder the terms:
-20 + -6x + 3x2 = 20 + 6x + -20 + -6x

Reorder the terms:
-20 + -6x + 3x2 = 20 + -20 + 6x + -6x

Combine like terms: 20 + -20 = 0
-20 + -6x + 3x2 = 0 + 6x + -6x
-20 + -6x + 3x2 = 6x + -6x

Combine like terms: 6x + -6x = 0
-20 + -6x + 3x2 = 0

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

Divide each side by '3'.
-6.666666667 + -2x + x2 = 0

Move the constant term to the right:

Add '6.666666667' to each side of the equation.
-6.666666667 + -2x + 6.666666667 + x2 = 0 + 6.666666667

Reorder the terms:
-6.666666667 + 6.666666667 + -2x + x2 = 0 + 6.666666667

Combine like terms: -6.666666667 + 6.666666667 = 0.000000000
0.000000000 + -2x + x2 = 0 + 6.666666667
-2x + x2 = 0 + 6.666666667

Combine like terms: 0 + 6.666666667 = 6.666666667
-2x + x2 = 6.666666667

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 6.666666667 + 1

Reorder the terms:
1 + -2x + x2 = 6.666666667 + 1

Combine like terms: 6.666666667 + 1 = 7.666666667
1 + -2x + x2 = 7.666666667

Factor a perfect square on the left side:
(x + -1)(x + -1) = 7.666666667

Calculate the square root of the right side: 2.768874621

Break this problem into two subproblems by setting 
(x + -1) equal to 2.768874621 and -2.768874621.

Subproblem 1

x + -1 = 2.768874621 Simplifying x + -1 = 2.768874621 Reorder the terms: -1 + x = 2.768874621 Solving -1 + x = 2.768874621 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 2.768874621 + 1 Combine like terms: -1 + 1 = 0 0 + x = 2.768874621 + 1 x = 2.768874621 + 1 Combine like terms: 2.768874621 + 1 = 3.768874621 x = 3.768874621 Simplifying x = 3.768874621

Subproblem 2

x + -1 = -2.768874621 Simplifying x + -1 = -2.768874621 Reorder the terms: -1 + x = -2.768874621 Solving -1 + x = -2.768874621 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -2.768874621 + 1 Combine like terms: -1 + 1 = 0 0 + x = -2.768874621 + 1 x = -2.768874621 + 1 Combine like terms: -2.768874621 + 1 = -1.768874621 x = -1.768874621 Simplifying x = -1.768874621

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.768874621, -1.768874621}

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