4t^3-5t^2=21t

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Solution for 4t^3-5t^2=21t equation:


Simplifying
4t3 + -5t2 = 21t

Reorder the terms:
-5t2 + 4t3 = 21t

Solving
-5t2 + 4t3 = 21t

Solving for variable 't'.

Reorder the terms:
-21t + -5t2 + 4t3 = 21t + -21t

Combine like terms: 21t + -21t = 0
-21t + -5t2 + 4t3 = 0

Factor out the Greatest Common Factor (GCF), 't'.
t(-21 + -5t + 4t2) = 0

Factor a trinomial.
t((-7 + -4t)(3 + -1t)) = 0

Subproblem 1

Set the factor 't' equal to zero and attempt to solve: Simplifying t = 0 Solving t = 0 Move all terms containing t to the left, all other terms to the right. Simplifying t = 0

Subproblem 2

Set the factor '(-7 + -4t)' equal to zero and attempt to solve: Simplifying -7 + -4t = 0 Solving -7 + -4t = 0 Move all terms containing t to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -4t = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -4t = 0 + 7 -4t = 0 + 7 Combine like terms: 0 + 7 = 7 -4t = 7 Divide each side by '-4'. t = -1.75 Simplifying t = -1.75

Subproblem 3

Set the factor '(3 + -1t)' equal to zero and attempt to solve: Simplifying 3 + -1t = 0 Solving 3 + -1t = 0 Move all terms containing t to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1t = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1t = 0 + -3 -1t = 0 + -3 Combine like terms: 0 + -3 = -3 -1t = -3 Divide each side by '-1'. t = 3 Simplifying t = 3

Solution

t = {0, -1.75, 3}

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