Question

9. If x= 1/3
y= -1/2
and
then show that (x × x × x - y×y×y) + (x - y) = (x ×x+x×y + y × y).
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Answer 1

Q. (x^3-y^3)+(x-y)=(x^2+xy+y^2)

and x=1/3, y=-1/2

(1/27+1/8)+(1/3+1/2) =(1/9-1/6+1/4)

(35/216)+(5/6)=1/9-1/6+1/4

215/216=7/36