2t^3-8t^2=42t

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Solution for 2t^3-8t^2=42t equation:


Simplifying
2t3 + -8t2 = 42t

Reorder the terms:
-8t2 + 2t3 = 42t

Solving
-8t2 + 2t3 = 42t

Solving for variable 't'.

Reorder the terms:
-42t + -8t2 + 2t3 = 42t + -42t

Combine like terms: 42t + -42t = 0
-42t + -8t2 + 2t3 = 0

Factor out the Greatest Common Factor (GCF), '2t'.
2t(-21 + -4t + t2) = 0

Factor a trinomial.
2t((-3 + -1t)(7 + -1t)) = 0

Ignore the factor 2.

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 '(-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

Subproblem 3

Set the factor '(7 + -1t)' equal to zero and attempt to solve: Simplifying 7 + -1t = 0 Solving 7 + -1t = 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 + -1t = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1t = 0 + -7 -1t = 0 + -7 Combine like terms: 0 + -7 = -7 -1t = -7 Divide each side by '-1'. t = 7 Simplifying t = 7

Solution

t = {0, -3, 7}

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