Question

(1:5p+1.2q)² - C1.5p-1.2q)²​

Answer 1

Answer:

7.2pq

Step-by-step explanation:

let ,

1.5p = a

1.2q = b

this gives,

(1.5p+1.2q)² - (1.5p-1.2q)² = (a+b)² - (a-b)²

=> (a+b)² - (a-b)² = (a²+b²+2ab) - (a²+b²-2ab)

=> a²+b²+2ab -a²-b²+2ab

=> 4ab

putting value of a & b

we get,

(1.5p+1.2q)² - (1.5p-1.2q)²= 4×(1.5p)×(1.2q)

=> 7.2pq