Question

If xsquare+ysquare=49 and x-y=3 then what is the value of x3-y3

Answer 1

Answer:

Step-by-step explanation:

Answer 2

(x-y)2=x2+y2-2xy=49-2xy

(x-y)2=3×3=9

=49-2xy=9

-2xy=9-49

xy=20

x3-y3=(x-y)(x2+xy+y2)

=3(49+20)

=3×69

=207