Question

Please answer anyone.

Find the value of x³-27y³-343-63xy where x=2y+7.

Answer 1

Answer:

=−19y3−42y2−147y

Step-by-step explanation:

Let's simplify step-by-step.

(2y+7)3−27y3−343−63(2y+7)y

Distribute:

=8y3+84y2+294y+343+−27y3+−343+−126y2+−441y

Combine Like Terms:

=8y3+84y2+294y+343+−27y3+−343+−126y2+−441y

=(8y3+−27y3)+(84y2+−126y2)+(294y+−441y)+(343+−343)

=−19y3+−42y2+−147y

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Answer 2

Answer:

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Refer to above attachment

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