If alpha and beta are the zeros of the polynomial 2x^2-4x+5,find the value of alpha^2-beta^2

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If alpha and beta are the zeros of the polynomial 2x^2-4x+5,find the value of
a) alpha^2 - beta^2
b) alpha^2 + beta^2
c) 1/alpha + 1/beta
d) 1/alpha^2 + 1/beta^2
e) (alpha - beta)^2

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