Question

if x =2 , y=3and z=5 , find the value of 4x- y+z​

Answer 1

Answer:

4(x) -y+z=0

Step-by-step explanation:

4(2)-3+5

8-8

0

Answer 2

Answer:

38

Step-by-step explanation:

Given- x=−2,y=3,z=1

So, x 3 +y 3 +z 3 −3xyz

=(x+y+z)(x 2 +y 2+z 2 −xy−yz−zx)

=(−2+3+1)((−2) 2 +(3) 2 +(1) 2−(−6)−(−3)−(−2))

=(2)(4+9+1+6−3+2)

=(2)(19)

=38