evaluate (9x-4y)^3 just like (a+b)^3
Answers
Answered by
2
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.....
Answered by
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)
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