Q:

What are the solutions of 3x^2 - x +7 =0?

Accepted Solution

A:
Answer: Option A[tex]x=\frac{1+\sqrt{83}i}{6}[/tex] or [tex]x=\frac{1-\sqrt{83}i}{6}[/tex] Step-by-step explanation:Use the quadratic formula to find the zeros of the function.For a function of the form[tex]ax ^ 2 + bx + c = 0[/tex]The quadratic formula is:[tex]x=\frac{-b\±\sqrt{b^2-4ac}}{2a}[/tex]In this case the function is:[tex]3x^2-x+7=0[/tex]So [tex]a=3\\b=-1\\c=7[/tex]Then using the quadratic formula we have that:[tex]x=\frac{-(-1)\±\sqrt{(-1)^2-4(3)(7)}}{2(3)}[/tex][tex]x=\frac{1\±\sqrt{1-84}}{6}[/tex][tex]x=\frac{1\±\sqrt{-83}}{6}[/tex]Remember that [tex]\sqrt{-1}=i[/tex][tex]x=\frac{1\±\sqrt{83}*\sqrt{-1}}{6}[/tex][tex]x=\frac{1\±\sqrt{83}i}{6}[/tex][tex]x=\frac{1+\sqrt{83}i}{6}[/tex] or [tex]x=\frac{1-\sqrt{83}i}{6}[/tex]