Question

alpha and beta are roots of y2 - 2y - 7=0 find alpha2+beta2 and alpha 3+ beta 3​

Answer 1

Answer:

Your answer is in the attachment..

Step-by-step explanation:

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Answer 2

Answer:

18 and 50

Step-by-step explanation:

a=1 , b=-2 , C=-7

alpha+beta= -b/a =-(-2)/1 =2

alpha×beta= c/a =-7/1 = -7

(alpha)^2+(beta)^2 = (alpha+beta)^2-2×alpha×beta

=2^2-2(-7)

=4+14

=18

(alpha)^3+(beta)^3 = (alpha+beta)^3-3×alpha×beta(alpha+beta)

=(2)^3-3(-7)×2

=8+42

=50