(2x^3-7x^2+8x)+(8x^3+9x^2-11x)=

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Solution for (2x^3-7x^2+8x)+(8x^3+9x^2-11x)= equation:


Simplifying
(2x3 + -7x2 + 8x) + (8x3 + 9x2 + -11x) = 0

Reorder the terms:
(8x + -7x2 + 2x3) + (8x3 + 9x2 + -11x) = 0

Remove parenthesis around (8x + -7x2 + 2x3)
8x + -7x2 + 2x3 + (8x3 + 9x2 + -11x) = 0

Reorder the terms:
8x + -7x2 + 2x3 + (-11x + 9x2 + 8x3) = 0

Remove parenthesis around (-11x + 9x2 + 8x3)
8x + -7x2 + 2x3 + -11x + 9x2 + 8x3 = 0

Reorder the terms:
8x + -11x + -7x2 + 9x2 + 2x3 + 8x3 = 0

Combine like terms: 8x + -11x = -3x
-3x + -7x2 + 9x2 + 2x3 + 8x3 = 0

Combine like terms: -7x2 + 9x2 = 2x2
-3x + 2x2 + 2x3 + 8x3 = 0

Combine like terms: 2x3 + 8x3 = 10x3
-3x + 2x2 + 10x3 = 0

Solving
-3x + 2x2 + 10x3 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), 'x'.
x(-3 + 2x + 10x2) = 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 '(-3 + 2x + 10x2)' equal to zero and attempt to solve: Simplifying -3 + 2x + 10x2 = 0 Solving -3 + 2x + 10x2 = 0 Begin completing the square. Divide all terms by 10 the coefficient of the squared term: Divide each side by '10'. -0.3 + 0.2x + x2 = 0.0 Move the constant term to the right: Add '0.3' to each side of the equation. -0.3 + 0.2x + 0.3 + x2 = 0.0 + 0.3 Reorder the terms: -0.3 + 0.3 + 0.2x + x2 = 0.0 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + 0.2x + x2 = 0.0 + 0.3 0.2x + x2 = 0.0 + 0.3 Combine like terms: 0.0 + 0.3 = 0.3 0.2x + x2 = 0.3 The x term is 0.2x. Take half its coefficient (0.1). Square it (0.01) and add it to both sides. Add '0.01' to each side of the equation. 0.2x + 0.01 + x2 = 0.3 + 0.01 Reorder the terms: 0.01 + 0.2x + x2 = 0.3 + 0.01 Combine like terms: 0.3 + 0.01 = 0.31 0.01 + 0.2x + x2 = 0.31 Factor a perfect square on the left side: (x + 0.1)(x + 0.1) = 0.31 Calculate the square root of the right side: 0.556776436 Break this problem into two subproblems by setting (x + 0.1) equal to 0.556776436 and -0.556776436.

Subproblem 1

x + 0.1 = 0.556776436 Simplifying x + 0.1 = 0.556776436 Reorder the terms: 0.1 + x = 0.556776436 Solving 0.1 + x = 0.556776436 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + x = 0.556776436 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + x = 0.556776436 + -0.1 x = 0.556776436 + -0.1 Combine like terms: 0.556776436 + -0.1 = 0.456776436 x = 0.456776436 Simplifying x = 0.456776436

Subproblem 2

x + 0.1 = -0.556776436 Simplifying x + 0.1 = -0.556776436 Reorder the terms: 0.1 + x = -0.556776436 Solving 0.1 + x = -0.556776436 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + x = -0.556776436 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + x = -0.556776436 + -0.1 x = -0.556776436 + -0.1 Combine like terms: -0.556776436 + -0.1 = -0.656776436 x = -0.656776436 Simplifying x = -0.656776436

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.456776436, -0.656776436}

Solution

x = {0, 0.456776436, -0.656776436}

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