20. If 49x^2 – b = (7x + 1/2) (7x – 1/2), then the value of b is 20. If 49x^2 - b = (7x + 1/2) (7x - 1/2) then the value of b is June 27, 2021 Category: Chapter 2 - Polynomials , Maths , NCERT Class 9 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related