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1. Factorise

(x-3)(x-2) =0

Therefore  x-3=0, x=3. Also x-2=0, x=2.

Find 3.6262 (recurring) as a fraction s=3.626262 (recurring) 100s= 362.626262 99s= 100s - s 99s=359 s=359/99

= (30/15+11/15) - (3/3+1/3) = (41/15)-(4/3) = (41/15)-(20/15) = (21/15) = (7/5)

2x²(x² + 2 - 16x)

First, convert the units so you can compare more easily. 

0.72m = 72cm = 720mm

So 1 shelf is 720mm and 1 textbook is 30mm wide. 

To find the maximum number of books that can be stored...