Q. What is the focus of the parabola y=−8x2−5?Simplify any fractions.(______,______)
Identify vertex form: Identify the vertex form of the parabola.The given equation y=−8x2−5 is similar to y=a(x−h)2+k, where a=−8, h=0, and k=−5.
Calculate p value: Calculate the value of p using the formula p=4a1.p=4(−8)1p=−321
Find focus: Find the focus of the parabola using the vertex (h,k) and the value of p. The focus is at (h,k+p). Focus = (0,−5−321) Focus = (0,−32160−321) Focus = (0,−32161)
More problems from Find the focus or directrix of a parabola