Question 92 (xvi)
Factorise the following using the identity a2−b2=(a+b)(a−b).
1331x3y−11y3x
1331x3y−11y3x=(11)3x3y−11y3x=11xy(112x2−y2)=11xy[(11x)2−y2]=11xy(11x+y)(11x−y)
Question 92 (xxv)
16x4−625y4
Question 92 (xxiii)
x4−y4
Question 92 (xix)
x4−1
Question 92 (v)
28ay2−175ax2