Question

-Can you find the vertex of y = x2 + 3x - 10?
I need help .

Answer 1

somewhere near (-1,-12)

Answer 2

http://www.google.com/#hl=en&sclient=psy-ab&q=y+%3D+x%5E2%2B3x-10&oq=y+%3D+x%5E2%2B3x-10&aq=f&aqi=g-CK3g-mCK1&aql=1&gs_l=hp.3..0i33i30l3j0i5i33i30.36903.36903.22.39294.1.1.0.0.0.0.167.167.0j1.1.0.cdvst.1.0.0.lMMbHYz3Ck8&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=281f5fbf74ffa19b&biw=1280&bih=880

Answer 3

divide coefficient of x by 2 this gives 3/2 = 1.5
y = (x + 1.5)^2 - 1.5^2 - 10
y = (x - 1.5)^2 - 12.25
this is the vertex form of equation

Answer 4

thanks

Answer 5

you could just say

-b/2a is your x coordinate

then plug whatever you get for your x coordinate back into the formula, and that will be your y coordinate

(x,y) is the answer.

Answer 6

the x coordinate of vertex is in the parentheses and the last number is the vertex
or you can do as funinabox said