Question

Calcular el valor numérico de las siguientes expresiones algebraicas, sabiendo que: 

x=3;y=2;z=4


 





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Answer 1

a. 2x³y-3xy²z-xyz

REEMPLAZAMOS

[2(3)³(2)]-[3(3)(2)²(4)]-[(3)(2)(4)]

RESOLVEMOS

[2(9)(2)]-[3(3)(4)(4)]-[(3)(2)(4)]

[36]-[144]-[24]

-204

b. 7xy²z+2x²yz-xyz³

REEMPLAZAMOS

[7(3)(2)²]+[2(3)²(2)(4)]-[(3)(2)(4)³]

RESOLVEMOS

[7(3)(4)]+[2(9)(2)(4)]-[(3)(2)(64)]

[64]+[144]-[382]

-174