It is a monomial.
(xy + 7)(x^2y^2 - 7xy + 49)
(x7 - y7) = (x - y)(x6 + x5y + x4y2 + x3y3 + x2y4 + xy5 + y6)
(xy - 7)(x^2y^2 + 7xy + 49)
(x2y2)3 + (x3y3)2 = 2x6y6.
#include<stdio.h> #include<conio.h> void main() { int x1, x2, x3, y1, y2, y3 ; printf("\nEnter the Co-ordinates of first point(x1,y1)"); scanf("d",&1x, &y1); printf("\nEnter the Co-ordinates of 2nd point(x2,y2)"); scanf("d",&x2, &y2); printf("\nEnter the Co-ordinates of 3rd point(x3,y3)"); scanf("d",&x3, &y3); if( (y2-y1)/(x2-x1)==(y3-y2)/(x3-x2) ) printf("The three points lie on straight line"); else printf("The three points do not lie on straight line"); getch(); }