Question

(31 /4)^2-(9/4)^2 ...using (a^2-b^2)=(a+b)(a-b)​

Answer 1

Answer:

55

Step-by-step explanation:

(31/4 + 9/4)(31/4 - 9/4)

(40/4)(22/4)

10(11/2)

5*11

55