I am sorry, but I would once again like to ask something. I coded it, but the graph is very small, I'd like it to be bigger. Do you know how to do that? I already tried image size, but that doesn't seem to work.
CloudDeploy[
FormFunction[{"a" -> "Number", "b" -> "Number", "c" -> "Number"},
StringForm["x = `` or x = ``.",(-#b-Sqrt[#b^2-4*#a*#c])/(2*#a),(-#b+Sqrt[#b^2-4*#a*#c])/(2*#a)]
Plot[#a*x^2+#b*x+#c,{x,-#b-Sqrt[((#b)^2-4*#a*#c)]/(2*#a),-#b+Sqrt[((#b)^2-4*#a*#c)]/(2*#a)}]&]]
Thanks in advance.