ОЧЕНЬ СРОЧНО ПОМОГИТЕ

Question

ОЧЕНЬ СРОЧНО ПОМОГИТЕ

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Answer 1

1)-d^2(4d+6)+9d^2(-d-5)
-d^2(4d)-d^2*6+9d^2(-d-5)
-1(4d^3)-d^2*6+9d^2(-d-5)
-1(4d^3)-6d^2+9d^2(-d-5)
-4d^3-6d^2+9d^2(-d-5)
-4d^3-6d^2+(9(-d^3)+9d^2*-5
-4d^3-6d^2+(-9d^3-45d^2)
-4d^3-6d^2-9d^3-45d^2
-13d^3-6d^2-45d^2
-13d^3-51d^2