Question

if 2 X + 3 Y = 12 and x y = 6 find the value of 8 x cube + 27 y cube.​

Answer 1

Answer:

Step-by-step explanation: 2 X + 3 Y = 12 ------ 1

xy=6------2

Cubing both sides

we get (2x+3y)³=12³

8x³+27y³+3*2x*3y(2x+3y)=1728

8x³+27y³+18xy(12)=1728------from 1

8x³+27y³+108*12=1728

8x³+27y³=1728-1296=432

Hope it would help you.....