3x^2+4x-63=0

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Solution for 3x^2+4x-63=0 equation:


Simplifying
3x2 + 4x + -63 = 0

Reorder the terms:
-63 + 4x + 3x2 = 0

Solving
-63 + 4x + 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 + 1.333333333x + x2 = 0

Move the constant term to the right:

Add '21' to each side of the equation.
-21 + 1.333333333x + 21 + x2 = 0 + 21

Reorder the terms:
-21 + 21 + 1.333333333x + x2 = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 1.333333333x + x2 = 0 + 21
1.333333333x + x2 = 0 + 21

Combine like terms: 0 + 21 = 21
1.333333333x + x2 = 21

The x term is 1.333333333x.  Take half its coefficient (0.6666666665).
Square it (0.4444444442) and add it to both sides.

Add '0.4444444442' to each side of the equation.
1.333333333x + 0.4444444442 + x2 = 21 + 0.4444444442

Reorder the terms:
0.4444444442 + 1.333333333x + x2 = 21 + 0.4444444442

Combine like terms: 21 + 0.4444444442 = 21.4444444442
0.4444444442 + 1.333333333x + x2 = 21.4444444442

Factor a perfect square on the left side:
(x + 0.6666666665)(x + 0.6666666665) = 21.4444444442

Calculate the square root of the right side: 4.630814663

Break this problem into two subproblems by setting 
(x + 0.6666666665) equal to 4.630814663 and -4.630814663.

Subproblem 1

x + 0.6666666665 = 4.630814663 Simplifying x + 0.6666666665 = 4.630814663 Reorder the terms: 0.6666666665 + x = 4.630814663 Solving 0.6666666665 + x = 4.630814663 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + x = 4.630814663 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + x = 4.630814663 + -0.6666666665 x = 4.630814663 + -0.6666666665 Combine like terms: 4.630814663 + -0.6666666665 = 3.9641479965 x = 3.9641479965 Simplifying x = 3.9641479965

Subproblem 2

x + 0.6666666665 = -4.630814663 Simplifying x + 0.6666666665 = -4.630814663 Reorder the terms: 0.6666666665 + x = -4.630814663 Solving 0.6666666665 + x = -4.630814663 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + x = -4.630814663 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + x = -4.630814663 + -0.6666666665 x = -4.630814663 + -0.6666666665 Combine like terms: -4.630814663 + -0.6666666665 = -5.2974813295 x = -5.2974813295 Simplifying x = -5.2974813295

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.9641479965, -5.2974813295}

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