Question

IF x+y=12 and xy=27 , find the value of x^3 + y^3.

Plz give me step by step explanation of this sum.​​Plz give me the answer as soon as possible and do it using identity​

Answer 1

Answer:

756

Step-by-step explanation:

As we know that,

(x+y)³=x³+y³+3xy(x+y)........(i)

so we will write what's given.

we have,

x+y=12 and xy=27

Putting the values in equation (i), we get

(12)³=x³+y³+3×27(12)

1728=x³+y³+81(12)

1728=x³+y³+972

x³+y³=1728-972=756

x³+y³=756

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