question_answer

If \[\sqrt{{{x}^{4}}+16\,\sqrt{3}{{x}^{3}}+162\,{{x}^{2}}-240\,\sqrt{3}x+225}\]\[=a{{x}^{2}}+bx+c,\] then which one among the following is incorrect?

A)  \[a\] and \[c\] are of opposite sign

B)  \[{{b}^{2}}+2\,ac=162\]

C)  \[For\,\,c=-\,15,\,\,a-b=1+8\,\sqrt{3}\]

D)  \[ab=8\,\sqrt{3}\]

E)  None of these