x^3+5x^2=9x

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Solution for x^3+5x^2=9x equation:


Simplifying
x3 + 5x2 = 9x

Reorder the terms:
5x2 + x3 = 9x

Solving
5x2 + x3 = 9x

Solving for variable 'x'.

Reorder the terms:
-9x + 5x2 + x3 = 9x + -9x

Combine like terms: 9x + -9x = 0
-9x + 5x2 + x3 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(-9 + 5x + x2) = 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 '(-9 + 5x + x2)' equal to zero and attempt to solve: Simplifying -9 + 5x + x2 = 0 Solving -9 + 5x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '9' to each side of the equation. -9 + 5x + 9 + x2 = 0 + 9 Reorder the terms: -9 + 9 + 5x + x2 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 5x + x2 = 0 + 9 5x + x2 = 0 + 9 Combine like terms: 0 + 9 = 9 5x + x2 = 9 The x term is 5x. Take half its coefficient (2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. 5x + 6.25 + x2 = 9 + 6.25 Reorder the terms: 6.25 + 5x + x2 = 9 + 6.25 Combine like terms: 9 + 6.25 = 15.25 6.25 + 5x + x2 = 15.25 Factor a perfect square on the left side: (x + 2.5)(x + 2.5) = 15.25 Calculate the square root of the right side: 3.905124838 Break this problem into two subproblems by setting (x + 2.5) equal to 3.905124838 and -3.905124838.

Subproblem 1

x + 2.5 = 3.905124838 Simplifying x + 2.5 = 3.905124838 Reorder the terms: 2.5 + x = 3.905124838 Solving 2.5 + x = 3.905124838 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 3.905124838 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 3.905124838 + -2.5 x = 3.905124838 + -2.5 Combine like terms: 3.905124838 + -2.5 = 1.405124838 x = 1.405124838 Simplifying x = 1.405124838

Subproblem 2

x + 2.5 = -3.905124838 Simplifying x + 2.5 = -3.905124838 Reorder the terms: 2.5 + x = -3.905124838 Solving 2.5 + x = -3.905124838 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -3.905124838 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -3.905124838 + -2.5 x = -3.905124838 + -2.5 Combine like terms: -3.905124838 + -2.5 = -6.405124838 x = -6.405124838 Simplifying x = -6.405124838

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.405124838, -6.405124838}

Solution

x = {0, 1.405124838, -6.405124838}

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