Question

if x =3 ,y = -2 and z = 5 find the value of the follwing 5xy + 4yz -3xz.

Answer 1

Answer:

given x=3 , y=-2 and z=5

Step-by-step explanation:

5xy + 4yz - 3xz = 5(3)(-2) + 4(-2)(5) - 3(3)(5)

                         = 15(-2) - 8(5) - 9(5)

                         = -30-40-45

5xy + 4yz - 3xz  = -115