Question

Compare and contrast the two quadratic equations below. In order to receive full credit, use complete sentences to describe the following:
The direction each parabola opens
The vertex of each parabola
y = x2 - 4x
y = -2x2 + 8x - 12

Answer 1

the general form of a quadratic equation is y=ax^2+bx+c
discriminant of the equation is given d=sqrt(b^2-4*a*c)
if d>0,the eqn has two real and unequal roots
d=0 real and equal roots
d<0 no real roots
if a>0 the graph of the eqn is an upward parabola
if a<0 then it is downward parabola
now try to do the question on ur own