What two numbers multiply to 1/4 and add to -1

Which is a true statement comparing the graphs of x^2/6^2-y^2/8^2 = 1 and x^2/8^2-y^2/6^2 the foci of both graphs are the same points. the lengths of both transverse axes are the same. the directrices of = 1 are horizontal while the directrices of = 1 are vertical. the vertices of = 1 are on the y-axis while the vertices of = 1 are on the x-axis.

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.