द्विघात समीकरण 4x² + 4x + 1 = 0 के मूल है? - - DwiGhat Samikaran 4x& # 178 ; + 4x + 1 = 0 Ke Mool Hai ? Maths in hindi, quadratic equations Wastwik Tatha Saman question answers in hindi pdf AbhiKalpit questions in hindi, Know About Wastwik Tatha Asaman Maths online test Maths notes in hindi quiz book Wastwik Dhanatmak