Question

If x=3, y=2 and z= -1, evaluate z( 5x - y )

Answer 1

Answer:

Given- x=−2,y=3,z=1

So, x3+y3+z3−3xyz=(x+y+z)(x2+y2+z2−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

Answer 2

So given x=3 and y=2 and z = -1 so the answer will be-

5*3 - 2
Since multiplication is first we will multiply to get 5*3= 15
Next subtraction so we will do 15-2 so the answer is
= 13