Question

Calcule o valor numérico das expressões algébras, para x= -1, y= 2 e z= 2

2xy² -3z
4x-2z+y
3x²y-z² y-1
-5x² yz
3-xy+2z
4z²-x-y²

Answer 1

2xy³ -3 2.-1.2 (2)³-3.2 2.-8.-3.2 96 4×-2z+y 4.(-1)-2.2+2 -4-2.2+2 -6.2+2 -12+2 -10 3x²y-y³.y-1 3 (-1)².2-(2)².2-1 -3.4.2-1 -12.2-1 -24-1 -235 -5x²yz -5 (-1)².2.2 -5.2.2 -10.2 -20 3-xy+2z 3-(-1).2+2. 2 3+1.2+2.2 4.2+2.2 8+2.2 10.2 20 4z²-x-y² 4. (2)²-(-1)-(2)² 4.4+1-4 16+1-4 17-4 13