Question

evaluate (9x-4y)^3 just like (a+b)^3​

Answer 1

Answer:

BELOW ANSWER IS GIVEN......

Step-by-step explanation:

we know that (a-b)³=a³-b³-3ab(a-b).

therefore in (9x-4y)³ a=9x, b=4y

substituting the value is a and b in the given formula.

(9x-4y)³=9x³-4y³-3(9x)(4y)(9x-4y)

=729x³-64y³-108xy(9x-4y)

=729x³-64y³-972x²y-432xy²

HOPE IT WILL HELP YOU.....

PLEASE MARK IT AS BRANLIEST.....

Answer 2

Answer:

As already explained by someone in the above answer So I will not explain much but I will just like to explain the formula..

Step-by-step explanation:

(a+b)^3= a^3 + 3a^2b + 3ab^2+b^3

: &

a^3 + b^3+3ab ( ab)