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Soal nomor 2
3b – bx/cx – 3c
Jawab:
3b – bx/cx – 3c = (-1) (bx – 3b)/ (cx – 3c)
= (-1) (b) (x – 3)/c (x – 3)
= -b/c
Soal nomor 3
3/x+1 + 3/x-1
BERITA REKOMENDASI
Jawab:
3 + 3/x + 1 = 3(x – 1) /x – 1 + 3 (x + 1)/(x + 1)( x – 1)
= 3x – 3 + 3x + 1/(x² – 1)
= 6x /x² – 1
Soal nomor 4
x/x+y + y/x-y