Question

(y2-2y)2-y2(y+3)(y-3)+2y(2y2+5)

Answer 1

(y²-2y)²-y²(y+3)(y-3)+2y(2y²+5)= y⁴-4y³+4y²-y²(y²-9)+4y³+10y= y⁴+4y²-y⁴+9y²+10y= 13y²+10y= y(13y+10)