Jawapan

2015-10-03T22:29:05+08:00
I) r = 3mn - p^2
3mn = r + p^2
m = (r + p^2) /3n

ii) m = (r + p^2) /3n
m = (8 + 3^2) /3(4)
m = (8 + 9) /12
m = 17/12
2015-10-03T22:39:55+08:00
I) P² = 3mn-r

   P  = √3mn-r

ii) R = 3mn-p²
    8 = 3m(4)-B²
    8 = 12m-9
12m=-9-8
   12m = 17
M = 17÷12

M = 1.42 @ 1,5 per 12