Answer:
1.-6
2. 105
3. -56
Step-by-step explanation:
1. xyz
= (2) (-1) (3)
= (-2)(3)
= -6
2. 2x3³ - 3y²
= 2(2)3³ - 3(-1)²
= 4(27)- 3(1)
= 108-3
=105
3. 2x²yz- 3xyz²+ x²yz²
= 2(2)²(-1)(3) - 3(2-1+3)² + (2)² (-1+3)²
= 2(4)(-3)- 3(4)² + 4(2)²
= -24 - 3(16) + 4(4)
= -24- 48+ 16
= -56
