Question

calcula el valor numerico de las siguientes expresiones algebraicas
a. 2x para x= -2
b. 7x-8 para x=4
c.(2x+3)2 (a la dos) para x = -1
d.3a-2b-c para a= -4 b= -5 c= -2

Answer 1

P(x) = 2x
P(-2) = 2(-2)
P(-2) = -4

P(x) = 7x-8
P(4) = 7(4)-8
P(4) = 28-8
P(4) = 20

P(x) = (2x+3)²
P(-1) = (2(-1) + 3)²
P(-1) = (-2 + 3)²
P(-1) = (1)²
P(-1) = 1

P(a,b,c) = 3a-2b-c
P(-4,-5,-2) = 3(-4)-2(-5)-(-2)
P(-4,-5,-2) = -12 + 10 + 2
P(-4,-5,-2) = 0

Answer 2

Respuesta:

P(x) = 2x

P(-2) = 2(-2)

P(-2) = -4

P(x) = 7x-8

P(4) = 7(4)-8

P(4) = 28-8

P(4) = 20

P(x) = (2x+3)²

P(-1) = (2(-1) + 3)²

P(-1) = (-2 + 3)²

P(-1) = (1)²

P(-1) = 1

P(a,b,c) = 3a-2b-c

P(-4,-5,-2) = 3(-4)-2(-5)-(-2)

P(-4,-5,-2) = -12 + 10 + 2

P(-4,-5,-2) = 0

Explicación paso a paso: