Which of the following expressions is a polynomial ? (a) 3√y+4 (b) √y−3 (c) y (d) 1√y+7
y2+2y−3=?(a) (y−1)(y+3)(b) (y+1)(y−3)(c) (y−1)(y−3)(d) (y+2)(y−3)
What is (x−y)3?