9x^7-72x^6+18x^5=0

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Solution for 9x^7-72x^6+18x^5=0 equation:


Simplifying
9x7 + -72x6 + 18x5 = 0

Reorder the terms:
18x5 + -72x6 + 9x7 = 0

Solving
18x5 + -72x6 + 9x7 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '9x5'.
9x5(2 + -8x + x2) = 0

Ignore the factor 9.

Subproblem 1

Set the factor 'x5' equal to zero and attempt to solve: Simplifying x5 = 0 Solving x5 = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x5 = 0 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(2 + -8x + x2)' equal to zero and attempt to solve: Simplifying 2 + -8x + x2 = 0 Solving 2 + -8x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-2' to each side of the equation. 2 + -8x + -2 + x2 = 0 + -2 Reorder the terms: 2 + -2 + -8x + x2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -8x + x2 = 0 + -2 -8x + x2 = 0 + -2 Combine like terms: 0 + -2 = -2 -8x + x2 = -2 The x term is -8x. Take half its coefficient (-4). Square it (16) and add it to both sides. Add '16' to each side of the equation. -8x + 16 + x2 = -2 + 16 Reorder the terms: 16 + -8x + x2 = -2 + 16 Combine like terms: -2 + 16 = 14 16 + -8x + x2 = 14 Factor a perfect square on the left side: (x + -4)(x + -4) = 14 Calculate the square root of the right side: 3.741657387 Break this problem into two subproblems by setting (x + -4) equal to 3.741657387 and -3.741657387.

Subproblem 1

x + -4 = 3.741657387 Simplifying x + -4 = 3.741657387 Reorder the terms: -4 + x = 3.741657387 Solving -4 + x = 3.741657387 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 3.741657387 + 4 Combine like terms: -4 + 4 = 0 0 + x = 3.741657387 + 4 x = 3.741657387 + 4 Combine like terms: 3.741657387 + 4 = 7.741657387 x = 7.741657387 Simplifying x = 7.741657387

Subproblem 2

x + -4 = -3.741657387 Simplifying x + -4 = -3.741657387 Reorder the terms: -4 + x = -3.741657387 Solving -4 + x = -3.741657387 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -3.741657387 + 4 Combine like terms: -4 + 4 = 0 0 + x = -3.741657387 + 4 x = -3.741657387 + 4 Combine like terms: -3.741657387 + 4 = 0.258342613 x = 0.258342613 Simplifying x = 0.258342613

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.741657387, 0.258342613}

Solution

x = {7.741657387, 0.258342613}

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