X^2=4x-15 solve with quadratic formula

Explain how you could use the interactive table to tell if sets of points are on the same line. math 8

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?

Can someone plz me understand how to do these. plz, show work.in exercises 1-4, rewrite the expression in rational exponent form.[tex]\sqrt[4]{625} \sqrt[3]{512} (\sqrt[5]{4} )³ (\sqrt[4]{15} )^{7}\\ (\sqrt[3]{27} )^{2}[/tex]