Question

answer this small simple formulas​

Answer 1

a = x

b = y

1. (a + b)²

= (x + y)²

= x² + y² + 2xy

2. (a - b)²

= (x - y)²

= x² + y² - 2xy

3. (a + b) (a - b)

= (x + y) (x - y)

= x² - y²