Question

(2p-5q)(2p+5q)-(2p+q)(2p-q)​

Answer 1

Answer:

-24q²

Step-by-step explanation:

The general pattern here is:

     ( a - b ) ( a + b ) = a² - b²

So....

   (2p - 5q)(2p + 5q) - (2p + q)(2p - q)

=  [ (2p)² - (5q)² ] - [ (2p)² - q² ]

= (2p)² - (5q)² - (2p)² + q²

= - (5q)² + q²

= -25q² + q²

= -24q²