Graphing y=ax2+bx+c 

Karl Fisch yes thank you

Plug in what you got when you did x= -b/2a into the original equation. So he got -3 so he put it into y=x^2+6x+2 and got -7 therefore his vertex was (-3, -7) (I know this is four years later sorry heh. Hope this still helps lmao)

Kitty Kiss helped me thanks

@@creamycatss lol

the y intercept is the coordinate where the parabola hits the main y line i think

Isn't *-3^2 = -9* (not 9) Which would make the formula *-9 - 18 + 2 = -25* (instead of 7) Making the vertex *(-3, -25)* Am I missing something?

A negative times a negative is a positive. -3 squared = -3 times -3, which equals 9.

@@emersonmoser9969 wow, smone replied 7 years comment been 3 years, you reply it been 2 years and i am here after that... wow

@@swastikayogi9932 Lol. I neglected to look at the time stamp when I replied.

@@emersonmoser9969 yea, fun right? That dude may be in his masters haha

Simply, put the value of x= -3 in the equation. Then you will get the value of y= -7. :) .

+Micheal F You can do it a variety of ways. One way is simply to factor out the GCF, which is x. So you get y = x(-x + 6). That means either x = 0 or x = 6. That gives you your x-intercepts of (0, 0) and (6, 0). Your vertex is then in the middle, at x = 3. Substitute 3 in for x and you get y = 9, so (3, 9) would be your vertex. You can now sketch the graph.

thanks karl, cheers

patabotic table

Suzana Bacaleinick Are you asking about the (-3, 12) in the table of values in GP1? If so, you fill in -3 for x, so you get 5(-3)^2 + 10(-3) - 3. That simplifies to 5 * 9 + -30 - 3, which simplifies to 45 + -30 -3, which simplies to 12. So the ordered pair is (-3, 12).

thank you

+grace will The axis of symmetry is -b/2a. In this case, that's -6 divided by 2(-1/2). So that ends up being -6/-1 which divides to positive 6.