Question

if 2x+3y=12and xy=6,find the value of 8x cube +27y cube

Answer 1

Answer:

2x + 3y = 12

(2x + 3y)cube = 12×12×12

8xcube +27ycube +3(2x×3y)(2x + 3y)=144×12

8xcube +27ycube +3×36×12=144×12

8xcube +27cube=144×12 -(3×36×12)

Answer is 432

Step-by-step explanation: