IF THE QUADRATIC eqution px^2-2√5px+15=0 has two equal roots, than find the value of p

IF THE QUADRATIC eqution px^2-2√5px+15=0 has two equal roots, than f

1.	IF THE QUADRATIC eqution px^2-2√5px+15=0 has two equal roots, than find the value of p
Answer» when roots equal;(b=-2×5^0.5×p; a=p; c=15)D=0》b^2-4ac=0》20p^2-60p=0》p^2-3p=0》p(p-3)=0》p=0 or p=3