t^4-7=9

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Solution for t^4-7=9 equation:


Simplifying
t4 + -7 = 9

Reorder the terms:
-7 + t4 = 9

Solving
-7 + t4 = 9

Solving for variable 't'.

Move all terms containing t to the left, all other terms to the right.

Add '7' to each side of the equation.
-7 + 7 + t4 = 9 + 7

Combine like terms: -7 + 7 = 0
0 + t4 = 9 + 7
t4 = 9 + 7

Combine like terms: 9 + 7 = 16
t4 = 16

Simplifying
t4 = 16

Reorder the terms:
-16 + t4 = 16 + -16

Combine like terms: 16 + -16 = 0
-16 + t4 = 0

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

Factor a difference between two squares.
(4 + t2)((2 + t)(-2 + t)) = 0

Subproblem 1

Set the factor '(4 + t2)' equal to zero and attempt to solve: Simplifying 4 + t2 = 0 Solving 4 + t2 = 0 Move all terms containing t to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + t2 = 0 + -4 Combine like terms: 4 + -4 = 0 0 + t2 = 0 + -4 t2 = 0 + -4 Combine like terms: 0 + -4 = -4 t2 = -4 Simplifying t2 = -4 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

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 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

Solution

t = {-2, 2}

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