Question

Find the value of the following expressions, when x = 2, y = -3 and z = 1. a)x² +y -z- 2xy 4yz + 3xz​

Answer 1

Step-by-step explanation:

if x=2,y=-3,z=1 then x²+y -z- 2xy +4yz + 3xz

=(2)²+(-3)-2(2)(-3)+4(-3)(1)+3(2)(1)

=4-3+12-12+6

=1+0+6

Ans=7

since you haven't put sign between 2xy and 4yz if there is negative sign then answer would be

=4-3+12+12+6

=1+24+6

=25+6

=31

if positive then 7