From figurea.Total deviation angle is 360−2(α+β)b. α+β=θc. δ=δ1+δ2 d. δ=360−2θ
If α, β are the roots of ax2 +2bx+c=0 and a+δ, β+δ are the roots of Ax2 + 2Bx + C=0 then b2–acB2−Ac is