t^4=5t^2-4

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


Simplifying
t4 = 5t2 + -4

Reorder the terms:
t4 = -4 + 5t2

Solving
t4 = -4 + 5t2

Solving for variable 't'.

Reorder the terms:
4 + -5t2 + t4 = -4 + 5t2 + 4 + -5t2

Reorder the terms:
4 + -5t2 + t4 = -4 + 4 + 5t2 + -5t2

Combine like terms: -4 + 4 = 0
4 + -5t2 + t4 = 0 + 5t2 + -5t2
4 + -5t2 + t4 = 5t2 + -5t2

Combine like terms: 5t2 + -5t2 = 0
4 + -5t2 + t4 = 0

Factor a trinomial.
(1 + -1t2)(4 + -1t2) = 0

Factor a difference between two squares.
((1 + t)(1 + -1t))(4 + -1t2) = 0

Factor a difference between two squares.
((2 + t)(2 + -1t))(1 + t)(1 + -1t) = 0

Subproblem 1

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

Subproblem 2

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

Subproblem 3

Set the factor '(2 + t)' equal to zero and attempt to solve: Simplifying 2 + t = 0 Solving 2 + t = 0 Move all terms containing t to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + t = 0 + -2 Combine like terms: 2 + -2 = 0 0 + t = 0 + -2 t = 0 + -2 Combine like terms: 0 + -2 = -2 t = -2 Simplifying t = -2

Subproblem 4

Set the factor '(2 + -1t)' equal to zero and attempt to solve: Simplifying 2 + -1t = 0 Solving 2 + -1t = 0 Move all terms containing t to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1t = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1t = 0 + -2 -1t = 0 + -2 Combine like terms: 0 + -2 = -2 -1t = -2 Divide each side by '-1'. t = 2 Simplifying t = 2

Solution

t = {-1, 1, -2, 2}

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