If

x = 3,

y = - 5 and z-7, find

x + yz + xyz.

143

Step-by-step explanation:

Since the values of x y and z are given

Substitute the value in the polynomial, so it'll become,

x+yz+xyz

= (3) + (-5) * (-7) + (3) * (-5) * (-7)

= 3+35 + (3) * (-7) * (-5)

{Two negatives when multiplied becomes positive}

=3+35+3*35

= 3+35+105

=143