Question

Find the value of 4xy(x-y)-6x²(y-y²)-3y²(2x²-x)+2xy(x-y) for x=5 and y=13

Answer 1

4*5*13(5-13)-6(5)²(13-13²)-3(13)²(2*5²-5)+2*5-13(5-13)
260*-8-150*156-507*45+3*-8
-2080-23400-22815-24
−48319