1) (5x²y) (– 3y+z) 2) (8x?y?z*t) = (-2xy?z?) 3) (3x2y) (7xy) 4) (-x)(4x? - 7x? - X+9)
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Respuesta:
El valor de las expresiones algebraicas es:
a. 0
b. 156
c. 73
d. -8438
e. 3743.5
Explicación:
Sea x=2, y=3, z=4
Se reemplazan en cada expresión:
a. 3x²y-2xy²=
3(2)²(3)-2(2)(3)²=
0
b. - ½x³y²+3x²z²=
- ½(2)³(3)²+3(2)²(4)²=
156
c. x²(y-2)-y(x+2)+3y³=
(2)²(3-2)-3(2+2)+3(3)³=
73
d. ⅔x³y²z-5x²y³z²+10=
⅔(2)³(3)²(4)-5(2)²(3)³(4)²+10=
-8438
e. ¾xy²z³-x²y³z²+x³y²z³-½=
¾(2)(3)²(4)³-(2)²(3)³(4)²+(2)³(3)²(4)³-½=
3743.5