3x^2+32x+63=0

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Solution for 3x^2+32x+63=0 equation:


Simplifying
3x2 + 32x + 63 = 0

Reorder the terms:
63 + 32x + 3x2 = 0

Solving
63 + 32x + 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'.
21 + 10.66666667x + x2 = 0

Move the constant term to the right:

Add '-21' to each side of the equation.
21 + 10.66666667x + -21 + x2 = 0 + -21

Reorder the terms:
21 + -21 + 10.66666667x + x2 = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 10.66666667x + x2 = 0 + -21
10.66666667x + x2 = 0 + -21

Combine like terms: 0 + -21 = -21
10.66666667x + x2 = -21

The x term is 10.66666667x.  Take half its coefficient (5.333333335).
Square it (28.44444446) and add it to both sides.

Add '28.44444446' to each side of the equation.
10.66666667x + 28.44444446 + x2 = -21 + 28.44444446

Reorder the terms:
28.44444446 + 10.66666667x + x2 = -21 + 28.44444446

Combine like terms: -21 + 28.44444446 = 7.44444446
28.44444446 + 10.66666667x + x2 = 7.44444446

Factor a perfect square on the left side:
(x + 5.333333335)(x + 5.333333335) = 7.44444446

Calculate the square root of the right side: 2.728450927

Break this problem into two subproblems by setting 
(x + 5.333333335) equal to 2.728450927 and -2.728450927.

Subproblem 1

x + 5.333333335 = 2.728450927 Simplifying x + 5.333333335 = 2.728450927 Reorder the terms: 5.333333335 + x = 2.728450927 Solving 5.333333335 + x = 2.728450927 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.333333335' to each side of the equation. 5.333333335 + -5.333333335 + x = 2.728450927 + -5.333333335 Combine like terms: 5.333333335 + -5.333333335 = 0.000000000 0.000000000 + x = 2.728450927 + -5.333333335 x = 2.728450927 + -5.333333335 Combine like terms: 2.728450927 + -5.333333335 = -2.604882408 x = -2.604882408 Simplifying x = -2.604882408

Subproblem 2

x + 5.333333335 = -2.728450927 Simplifying x + 5.333333335 = -2.728450927 Reorder the terms: 5.333333335 + x = -2.728450927 Solving 5.333333335 + x = -2.728450927 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.333333335' to each side of the equation. 5.333333335 + -5.333333335 + x = -2.728450927 + -5.333333335 Combine like terms: 5.333333335 + -5.333333335 = 0.000000000 0.000000000 + x = -2.728450927 + -5.333333335 x = -2.728450927 + -5.333333335 Combine like terms: -2.728450927 + -5.333333335 = -8.061784262 x = -8.061784262 Simplifying x = -8.061784262

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2.604882408, -8.061784262}

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