Question

i will give you 50 points give me my required answer
Don't comments like I don't know the answer, Try it from google etc.
from question 13. to 20​

Answer 1

13-

a²-(b-c)²

a²-(b²-2bc+c²)

a²-b²+2bc-c²

a²-b²-c²+2bc.

14-

25m²-(4n+3l)²

25m²-((4n)²+(3l)²+2×4n×3l)

25m²-16n²-9l²-24nl

i hope it help you