Question

1. Use the formula to multiply the following.
(i) (x + y) (x - y) x? -Y?
(ii) (a + 6) (a - 6)​

Answer 1

i ) ( x + y ) ( x - y )

( a - b ) ( a + b ) = a² - b²

x² - y²

ii ) ( a + 6 ) ( a - b )

a² - ab + 6a - 6b