4t^4+5t^2-9=0

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Solution for 4t^4+5t^2-9=0 equation:


Simplifying
4t4 + 5t2 + -9 = 0

Reorder the terms:
-9 + 5t2 + 4t4 = 0

Solving
-9 + 5t2 + 4t4 = 0

Solving for variable 't'.

Factor a trinomial.
(-9 + -4t2)(1 + -1t2) = 0

Factor a difference between two squares.
(-9 + -4t2)((1 + t)(1 + -1t)) = 0

Subproblem 1

Set the factor '(-9 + -4t2)' equal to zero and attempt to solve: Simplifying -9 + -4t2 = 0 Solving -9 + -4t2 = 0 Move all terms containing t to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -4t2 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -4t2 = 0 + 9 -4t2 = 0 + 9 Combine like terms: 0 + 9 = 9 -4t2 = 9 Divide each side by '-4'. t2 = -2.25 Simplifying t2 = -2.25 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 '(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 3

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

Solution

t = {-1, 1}

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