1. xyz
(2)(-1)(3)= -6
2. 4x⁴-9y²
4(2⁴)-9(-1)²
4(16)-9(1)
64-9= 55
3.3x²yz³-4xy²z²+xy³z
3(2²)(-1)(3³)-4(2)(-1)²(3²)+(2)(-1)³(3)
3(4)(-1)(27)-4(2)(1)(9)+(2)(-1)(3)
3(-108)-4(18)+(-6)
-324+(-72)+(-6)= -402
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Given values of x, y and z are x= 2, y= -1 and z= 3
1. xyz
(2)(-1)(3)= -6
2. 4x⁴-9y²
4(2⁴)-9(-1)²
4(16)-9(1)
64-9= 55
3.3x²yz³-4xy²z²+xy³z
3(2²)(-1)(3³)-4(2)(-1)²(3²)+(2)(-1)³(3)
3(4)(-1)(27)-4(2)(1)(9)+(2)(-1)(3)
3(-108)-4(18)+(-6)
-324+(-72)+(-6)= -402
#CarryOnLearning