Which constant must be added and subtracted to solve the quadratic equation 9x^2 + 3/4 x – √2 = 0 by the method of completing the square? Which constant must be added and subtracted to solve the quadratic equation 9x^2 + 3/4 x – √2 = 0 by the method of completing the square? November 22, 2020 Category: Chapter 4 - Quadratic Equations , Maths , NCERT Class 10 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related