Question

if 49,x^2-k=(7 x+1/3) ( 7x÷1/3) then the value of k is​

Answer 1

Step-by-step explanation:

7x+21)(7x−21)=49x2−b

⇒49x2−41=49x2−b                           (∵(a−b)(a+b)=a2−b2)

⇒b=41