13 2dBeli produk 13-2nd on, produk terlengkap dan harga terbaik. Dapatkan berbagai promo menarik. Belanja aman dan nyaman hanya di .On putting A=0 and B=13, we can get 13. On putting D=0 and B=13 in eqn (2), we can still get 13. Thus, we can say that the value of D cannot be determed from the given data.