7th Class
Mathematics
Sample Paper
Maths Olympiad Model Test Paper-18
question_answer
Find the value of \[4xy\left( x-y \right)-6{{x}^{2}}\left( y-{{y}^{2}} \right)-\] \[3{{y}^{2}}\left( 2{{x}^{2}}-x \right)+2xy\left( x-y \right)\] for \[x=5\] and \[y=13\]