Question

If x= 2 and y=−1, find the value of the expression x2−xy+y2.

Answer 1

Answer:

4

Step-by-step explanation:

x2-xy+y2

(2×2)-(2×-1)+(-1×2)

4+2-2=4 ans

Answer 2

Answer:

=x2 - xy + y + 2

=(2 ×2) - (2×1) + (1 × 2)

= 4 - 2 + 2

= 4 - 4

=0