Question

write the cube of (7x+4y)^3​

Answer 1

Answer:

343x^3+ 64y^3 +84(7x+ 4y)

Step-by-step explanation:

hope this help you.

Answer 2

Answer:

=the identity is. .

=x3+y3+3xy(a+b)

Step-by-step explanation:

=(7x) ^3+(4y) ^3+3(7x)(4y) (7x+4y)

=343x^3+64y^3+924x^2y^2....is the answer..........

I hope it helps you

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