Question

Give example for (x-y)²=x²-2xy+y²

Answer 1

Answer:

Step-by-step explanation:

suppose x=1 and y=2

so [1-2]^2 = [1]^2 -2[1][2]+[2]^2

 so [-1]^2 = 1-4+4

so 1 = 1

4 and -4 get cancelled