3x^2+10x=27

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Solution for 3x^2+10x=27 equation:


Simplifying
3x2 + 10x = 27

Reorder the terms:
10x + 3x2 = 27

Solving
10x + 3x2 = 27

Solving for variable 'x'.

Reorder the terms:
-27 + 10x + 3x2 = 27 + -27

Combine like terms: 27 + -27 = 0
-27 + 10x + 3x2 = 0

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

Divide each side by '3'.
-9 + 3.333333333x + x2 = 0

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + 3.333333333x + 9 + x2 = 0 + 9

Reorder the terms:
-9 + 9 + 3.333333333x + x2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 3.333333333x + x2 = 0 + 9
3.333333333x + x2 = 0 + 9

Combine like terms: 0 + 9 = 9
3.333333333x + x2 = 9

The x term is 3.333333333x.  Take half its coefficient (1.666666667).
Square it (2.777777779) and add it to both sides.

Add '2.777777779' to each side of the equation.
3.333333333x + 2.777777779 + x2 = 9 + 2.777777779

Reorder the terms:
2.777777779 + 3.333333333x + x2 = 9 + 2.777777779

Combine like terms: 9 + 2.777777779 = 11.777777779
2.777777779 + 3.333333333x + x2 = 11.777777779

Factor a perfect square on the left side:
(x + 1.666666667)(x + 1.666666667) = 11.777777779

Calculate the square root of the right side: 3.431876714

Break this problem into two subproblems by setting 
(x + 1.666666667) equal to 3.431876714 and -3.431876714.

Subproblem 1

x + 1.666666667 = 3.431876714 Simplifying x + 1.666666667 = 3.431876714 Reorder the terms: 1.666666667 + x = 3.431876714 Solving 1.666666667 + x = 3.431876714 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.666666667' to each side of the equation. 1.666666667 + -1.666666667 + x = 3.431876714 + -1.666666667 Combine like terms: 1.666666667 + -1.666666667 = 0.000000000 0.000000000 + x = 3.431876714 + -1.666666667 x = 3.431876714 + -1.666666667 Combine like terms: 3.431876714 + -1.666666667 = 1.765210047 x = 1.765210047 Simplifying x = 1.765210047

Subproblem 2

x + 1.666666667 = -3.431876714 Simplifying x + 1.666666667 = -3.431876714 Reorder the terms: 1.666666667 + x = -3.431876714 Solving 1.666666667 + x = -3.431876714 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.666666667' to each side of the equation. 1.666666667 + -1.666666667 + x = -3.431876714 + -1.666666667 Combine like terms: 1.666666667 + -1.666666667 = 0.000000000 0.000000000 + x = -3.431876714 + -1.666666667 x = -3.431876714 + -1.666666667 Combine like terms: -3.431876714 + -1.666666667 = -5.098543381 x = -5.098543381 Simplifying x = -5.098543381

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.765210047, -5.098543381}

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