Question

find the value of 27x³+8y³if 3x+2y=20 and xy=14/9

Answer 1

27x³+8y³

=(3x)³+(2y)³

a³+b³ = (a+b)³-3ab(a+b)

=(3x+2y)³-3(3x)(2y)(3x+2y)

=(20)³-18xy(20)

=(8000)-360(xy)

=8000-360(14/9)

=8000-40(14)

=8000-560

=7440

Hope it helps

Answer 2

Answer:

This is the answer .

Thank You