(6x^3-7x^2+6x)+(9x^3+9x^2-13x)=

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Solution for (6x^3-7x^2+6x)+(9x^3+9x^2-13x)= equation:


Simplifying
(6x3 + -7x2 + 6x) + (9x3 + 9x2 + -13x) = 0

Reorder the terms:
(6x + -7x2 + 6x3) + (9x3 + 9x2 + -13x) = 0

Remove parenthesis around (6x + -7x2 + 6x3)
6x + -7x2 + 6x3 + (9x3 + 9x2 + -13x) = 0

Reorder the terms:
6x + -7x2 + 6x3 + (-13x + 9x2 + 9x3) = 0

Remove parenthesis around (-13x + 9x2 + 9x3)
6x + -7x2 + 6x3 + -13x + 9x2 + 9x3 = 0

Reorder the terms:
6x + -13x + -7x2 + 9x2 + 6x3 + 9x3 = 0

Combine like terms: 6x + -13x = -7x
-7x + -7x2 + 9x2 + 6x3 + 9x3 = 0

Combine like terms: -7x2 + 9x2 = 2x2
-7x + 2x2 + 6x3 + 9x3 = 0

Combine like terms: 6x3 + 9x3 = 15x3
-7x + 2x2 + 15x3 = 0

Solving
-7x + 2x2 + 15x3 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), 'x'.
x(-7 + 2x + 15x2) = 0

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(-7 + 2x + 15x2)' equal to zero and attempt to solve: Simplifying -7 + 2x + 15x2 = 0 Solving -7 + 2x + 15x2 = 0 Begin completing the square. Divide all terms by 15 the coefficient of the squared term: Divide each side by '15'. -0.4666666667 + 0.1333333333x + x2 = 0 Move the constant term to the right: Add '0.4666666667' to each side of the equation. -0.4666666667 + 0.1333333333x + 0.4666666667 + x2 = 0 + 0.4666666667 Reorder the terms: -0.4666666667 + 0.4666666667 + 0.1333333333x + x2 = 0 + 0.4666666667 Combine like terms: -0.4666666667 + 0.4666666667 = 0.0000000000 0.0000000000 + 0.1333333333x + x2 = 0 + 0.4666666667 0.1333333333x + x2 = 0 + 0.4666666667 Combine like terms: 0 + 0.4666666667 = 0.4666666667 0.1333333333x + x2 = 0.4666666667 The x term is 0.1333333333x. Take half its coefficient (0.06666666665). Square it (0.004444444442) and add it to both sides. Add '0.004444444442' to each side of the equation. 0.1333333333x + 0.004444444442 + x2 = 0.4666666667 + 0.004444444442 Reorder the terms: 0.004444444442 + 0.1333333333x + x2 = 0.4666666667 + 0.004444444442 Combine like terms: 0.4666666667 + 0.004444444442 = 0.471111111142 0.004444444442 + 0.1333333333x + x2 = 0.471111111142 Factor a perfect square on the left side: (x + 0.06666666665)(x + 0.06666666665) = 0.471111111142 Calculate the square root of the right side: 0.686375343 Break this problem into two subproblems by setting (x + 0.06666666665) equal to 0.686375343 and -0.686375343.

Subproblem 1

x + 0.06666666665 = 0.686375343 Simplifying x + 0.06666666665 = 0.686375343 Reorder the terms: 0.06666666665 + x = 0.686375343 Solving 0.06666666665 + x = 0.686375343 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.06666666665' to each side of the equation. 0.06666666665 + -0.06666666665 + x = 0.686375343 + -0.06666666665 Combine like terms: 0.06666666665 + -0.06666666665 = 0.00000000000 0.00000000000 + x = 0.686375343 + -0.06666666665 x = 0.686375343 + -0.06666666665 Combine like terms: 0.686375343 + -0.06666666665 = 0.61970867635 x = 0.61970867635 Simplifying x = 0.61970867635

Subproblem 2

x + 0.06666666665 = -0.686375343 Simplifying x + 0.06666666665 = -0.686375343 Reorder the terms: 0.06666666665 + x = -0.686375343 Solving 0.06666666665 + x = -0.686375343 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.06666666665' to each side of the equation. 0.06666666665 + -0.06666666665 + x = -0.686375343 + -0.06666666665 Combine like terms: 0.06666666665 + -0.06666666665 = 0.00000000000 0.00000000000 + x = -0.686375343 + -0.06666666665 x = -0.686375343 + -0.06666666665 Combine like terms: -0.686375343 + -0.06666666665 = -0.75304200965 x = -0.75304200965 Simplifying x = -0.75304200965

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.61970867635, -0.75304200965}

Solution

x = {0, 0.61970867635, -0.75304200965}

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