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Simplifying y4 + 21y2 + -100 = 0 Reorder the terms: -100 + 21y2 + y4 = 0 Solving -100 + 21y2 + y4 = 0 Solving for variable 'y'. Factor a trinomial. (-25 + -1y2)(4 + -1y2) = 0 Factor a difference between two squares. (-25 + -1y2)((2 + y)(2 + -1y)) = 0Subproblem 1
Set the factor '(-25 + -1y2)' equal to zero and attempt to solve: Simplifying -25 + -1y2 = 0 Solving -25 + -1y2 = 0 Move all terms containing y to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + -1y2 = 0 + 25 Combine like terms: -25 + 25 = 0 0 + -1y2 = 0 + 25 -1y2 = 0 + 25 Combine like terms: 0 + 25 = 25 -1y2 = 25 Divide each side by '-1'. y2 = -25 Simplifying y2 = -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 '(2 + y)' equal to zero and attempt to solve: Simplifying 2 + y = 0 Solving 2 + y = 0 Move all terms containing y to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + y = 0 + -2 Combine like terms: 2 + -2 = 0 0 + y = 0 + -2 y = 0 + -2 Combine like terms: 0 + -2 = -2 y = -2 Simplifying y = -2Subproblem 3
Set the factor '(2 + -1y)' equal to zero and attempt to solve: Simplifying 2 + -1y = 0 Solving 2 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1y = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1y = 0 + -2 -1y = 0 + -2 Combine like terms: 0 + -2 = -2 -1y = -2 Divide each side by '-1'. y = 2 Simplifying y = 2Solution
y = {-2, 2}
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