Homework Help

what is the value of p(x)=xsquare-3x-4 at x=2  

user profile pic

pratyanka | Student, Grade 10 | eNotes Newbie

Posted July 4, 2012 at 4:48 PM via web

dislike 2 like

what is the value of p(x)=xsquare-3x-4 at x=2

 

1 Answer | Add Yours

user profile pic

sciencesolve | Teacher | (Level 3) Educator Emeritus

Posted July 4, 2012 at 4:55 PM (Answer #1)

dislike 1 like

Supposing that you need to find the value of `p(x) = x^2 - 3x - 4`  at x=2, you need to substitute 2 for x in equation `p(x) = x^2 - 3x - 4`  such that:

`p(2) = 2^2 - 3*2 - 4`

`p(2) = 4 - 6 - 4`

Reducing like terms yields:

`p(2) = -6`

Hence, evaluating the value of `p(x) = x^2 - 3x - 4`  at x=2 yields `p(2) = -6` .

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes