Question

a) (5-d^2 +2d)(2d-1)
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Answer 1

Answer:

answers are -2/5 and 1/2

Answer 2

Answer:

(5-d^2+2d)(2d-1)

= 2d(5-d^2+2d)-1(5-d^2+2d)

= 10d -2d^3 +4d^2 -5+d^2-2d

= 8d+5d^2 -2d^3