Question

If z = ( - 1 ) and y =1, find the value of the expression : z2 – z + zy

Answer 1

Answer:

z²-z+zy= (-1)²-(-1)+(1)(-1)

=1+1-1

=1

ans:1

Answer 2

Answer:

z2 - z + zy

=> here z = ( -1 ) and y = 1

so ,

=> ( -1 )^2 - ( -1 ) + ( -1 )×( 1 )

=> 1 + 1 - 1

=> 2 - 1

=> 1