Question

the value of (-21)×(-21)​

Answer 1

Answer:

helo guys its your answer

Step-by-step explanation:

The value of 20! + (21!/1!) + (22!/2!) + ..... + (60!/40!) is (A) 20! 61C20 (B) 21! 60C20 (C) 20! 61C21 (D) 21!

Answer 2

Answer:

$( - 21) \times ( - 21) \\ \implies \boxed{441}$