Question 58 (c)
Subtract:
−4x2y−y3 from x3+3xy2−x2y.
Question 57 (b)
Add the following expression:
x3−x2y−xy2−y3 and x3−2x2y+3xy2+4y
The expansion of (x+y)3 is
The expansion of (x+y)3 is x3+y3+3x2y−3xy2