Welcome :: Homework Help and Answers :: Mathskey.com
Welcome to Mathskey.com Question & Answers Community. Ask any math/science homework question and receive answers from other members of the community.

13,435 questions

17,804 answers

1,438 comments

130,374 users

what is the value of β?

0 votes
If f(x)=3x^2 + βx + 4 and f(−1) = 12,what is the value of β?
asked Dec 24, 2017 in PRECALCULUS by anonymous
reshown Dec 24, 2017 by bradely

1 Answer

0 votes

f(x)   =   3x^2 + βx + 4

Substitute x = -1 in above function

f(-1)   =   3(-1)^2 + β(-1) + 4

12   =   3(1) - β + 4             [ Since f(-1)  =  12 ]

β   =   7 - 12

β   =  - 5

The solution is β   =  - 5.

answered Dec 24, 2017 by homeworkhelp Mentor
reshown Dec 24, 2017 by bradely

Related questions

asked Sep 29, 2018 in ALGEBRA 1 by anonymous
asked Dec 23, 2017 in PRE-ALGEBRA by anonymous
...