Question

The graph of y = ax^2 + bx + c has a maximum turning point at (2,5). It is true to say that.
A. b^2 - 4 ac <0
B. b^2 =-4ac
C. b^2 - 4ac = 0
D. b^2 = 4ac
E. b^2 - 4ac > 0

Show me working out thanks.

Answer 1

using medals as bait is not against the rules perse, but it does come across as a bit tacky.

Answer 2

kk. sorry.

Answer 3

its safe to say that a parabola with a max is upside down

Answer 4

since the max is above the x axis its also safe to say that it has 2 real zeros

Answer 5

when \[b^2-4ac>0\] we have 2 real solutionss

Answer 6

hope that makes sense :)

Answer 7

yep it does, thanks. I have several more problems if u don't mind helping me?