Question

If x=2, y=-2, find the value of:
a. x²+ xy +y²
b. x²-2xy-y²
c. x²+3y²
​

Answer 1

Answer:

a. 4,b. 8, c. 16

Step-by-step explanation:

given x=2,

a. (2)^2+(2)(-2)+(-2)^2

= 4-4+4

= 4

b. (2)^2-2(2)(-2)-(-2)^2

=4+8-4

=8

c. (2)^2+3(-2)^2

=4+12

=16