Question

Find the discriminant of the equation root.7y^2 -6y-13root7=0

Answer 1

   

$p(y)=\sqrt{7}y^2-6y-13\sqrt{7}=0 \\ \\ \\ a=\sqrt{7} \\ \\ b=-6 \\ \\ c=-13\sqrt{7} \\ \\ \\ \Rightarrow\ b^2-4ac \\ \\ \Rightarrow\ (-6)^2-(4 \times \sqrt{7} \times -13\sqrt{7}) \\ \\ \Rightarrow\ 36-(-364) \\ \\ \Rightarrow\ 36+364 \\ \\ \Rightarrow\ \bold{400}$

So the value of discriminant is '400'!!!

Thank you...