# How do you graph #y=x^2 -4x-21#?

##### 1 Answer

Apr 9, 2018

Given -

#y=x^2-4x-21#

Find its

#x=(-b)/(2a)=(-(-4))/(2 xx 1)=4/2=2#

Take a few values on either side of

Find corresponding

Tabulate them

Plot them on a graph sheet. Join them with a smooth curve.