Question

Nmr 15&16 plise help me

Answer 1

15) x / x-4 + 5.(x-1) / (x-1).(x-4)
= x / x-4 + 5 / x-4
= x + 5 / x-4 ....(A)




16) 3a.(a-2) / 2.(a²-a-2) x 4.(a²+2a+1) / 6.(a²-1)
= 3a.(a-2) / 2.(a+1).(a-2) x 4.(a+1).(a+1) / 6.(a+1).(a-1)
= a.2 / 2.(a-1)
= 2a / 2.(a-1)
= a / a-1 .....(C)