Question

friends plz answer for this questions​

Answer 1

Step-by-step explanation:

if roots are equal then D=0 for quadratic equation.

so here we find D

D = 4(bc-ad)^2 - 4(a^2 + b^2)(c^2+d^2) =0

so we get , (bd)^2 + (ac)^2 + 2(abcd) =0

so it means :

(bd+ac)^2 =0

so. bd+ ac =0