Question

solve it fast........​

Answer 1

Answer:

Step-by-step explanation:

Given that,

x2+y2=49

x-y=3

We Know That,

(x-y)^2=x2-2xy+y2

=>3^2 =49-2xy

=>9=49-2xy

=>49-2xy=9

=>-2xy=9-49

=>-2xy= - 40

=>xy = -40 ÷ (-2)

=>xy = 20

By Putting the Value of x3-y3,

We get

x3-y3

=(x-y)(x2+y2+xy)

=3(49+xy)

=3×49+20

=3×69

= 207 (Ans)

__________________________

Hope this is correct and Useful for you.

Thanks.

Bye and enjoy