Nomor 17, 18 , & 19 Tolong pake cara ya.... Mksshhh bnyak

17) 14 = 2 × 7
21 = 3 × 7
63 = 3² × 7
fpb = 7
jadi jumlah keranjang = 7 ( B )

18) 4m²n + 3n + 5m³ - 7m - 6m³y³
koef n = 3
koef m = - 7
3 + ( - 7 ) = ( - 4 ) ( A )

19) m + 3k - 4 + m - 3k + 2
= 2m - 2 ( A )