z^3-4z^2+7z=0

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Solution for z^3-4z^2+7z=0 equation:


Simplifying
z3 + -4z2 + 7z = 0

Reorder the terms:
7z + -4z2 + z3 = 0

Solving
7z + -4z2 + z3 = 0

Solving for variable 'z'.

Factor out the Greatest Common Factor (GCF), 'z'.
z(7 + -4z + z2) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(7 + -4z + z2)' equal to zero and attempt to solve: Simplifying 7 + -4z + z2 = 0 Solving 7 + -4z + z2 = 0 Begin completing the square. Move the constant term to the right: Add '-7' to each side of the equation. 7 + -4z + -7 + z2 = 0 + -7 Reorder the terms: 7 + -7 + -4z + z2 = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -4z + z2 = 0 + -7 -4z + z2 = 0 + -7 Combine like terms: 0 + -7 = -7 -4z + z2 = -7 The z term is -4z. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4z + 4 + z2 = -7 + 4 Reorder the terms: 4 + -4z + z2 = -7 + 4 Combine like terms: -7 + 4 = -3 4 + -4z + z2 = -3 Factor a perfect square on the left side: (z + -2)(z + -2) = -3 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Solution

z = {0}

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