Tolong jawab ya No 14 , 15 , 16 , 18

14). xy²-5x²y+4xy²-3x²y
= xy²+4xy²-5x²y-3x²y
= 5xy²-8x²y
jawab: b.
15). (2y²z) (3x²y)
= 6x²y³z
jawab : a.
16). (2x-3) (3x+1)
= 6x²+2x-9x-3
= 6x²-7x-3
jawab : b
18). (2x+3) (x-2)
= 2x²-4x+3x-6
= 2x²-x-6
jawab : b
maaf kalau salah...