-x^2-3x+9

Question

-x^2-3x+9

anonymous · Answer

whats the prob here helpme? do you wanna solve for x?

anonymous · Answer

find the vertex

anonymous · Answer

ah ok, did you try first graphing this? you can see it if you graph it....say
y=-x^2-3x+9

amistre64 · Answer

id give it a shot, but apparently my negatives signs are off today ;)

anonymous · Answer

http://www.webgraphing.com/plotting_basic.jsp?gclid=CI2C_LPqhKgCFcVOHAodqhzCrw#

anonymous · Answer

idk what i keep doing wrong

amistre64 · Answer

-x^2-3x+9  the mirror image over the x axis is:

x^2+3x -9; so whatever the y value for this is at the vertex, change its sign

amistre64 · Answer

(-3/2,-(y))

 9         9(2)      9(4)      9-18 -36       -45
--- -  ----- -  ---- = ---------- =  ---- ; opposite that maybe
 4         2(2)      1(4)            4                 4

anonymous · Answer

A plot is attached.

amistre64 · Answer

(-3/2 , 45,4) ??