Question

find the value of the expression, if l = 1 , m = -1 and n = 0.
iska answer -4 hai
please explain step by step ​

Answer 1

Answer:

n²-4m²+lm-m²-2ml

=0²-4(-1)²+1(-1)-(-1)²-2(-1)1

=0-4×1-1-1×1+2

=0-4-1-1+2

=0-6+2

=0-4

= - 4