Question

Estimate graphically the local maximum and local minimum of f(x) = 4x^2 + 3x + 2

Local maximum: (-0.4,1.44); local minimum: (0,-0.37)

Local maximum: (-0.4,1.44); no local minimum

No local maximum; local minimum: (-0.4,1.44)

No local maximum; local minimum: (0,-0.37)

Answer 1

use the vertex form i suppose :)

Answer 2

I don't knwo it 0:

Answer 3

http://www.mathwarehouse.com/geometry/parabola/standard-and-vertex-form.php

Answer 4

Shall I begin?

Answer 5

You shall

Answer 6

So me and these chics went dipping and all, and then one of them was like really drunk.

Answer 7

Omg like no way like forreal ;D

Answer 8

See, girls always prefer to talk about crazy stuff than to do math.
@lornbeach Gotcha!

Answer 9

I just like to joke around :D

Answer 10

Of course, me too.
Use x = -b/2a

Answer 11

Can you help me get the function into the vertex form ?

Answer 12

You don't need that.
x = -b/2a = -3/8.
a is 4 which is positive, so no local maximum.

Answer 13

Always a good idea to look at the graph.

Answer 14

last answer ? @primeralph

Answer 15

No. That has x = 0.
I said x = -3/8.

Answer 16

which one then.. @primeralph

Answer 17

It's quite obvious, Dear.

Answer 18

I guess I'm not seeing it haha

Answer 19

No maximum. Not D.

Answer 20

a ?

Answer 21

Okay, it has no maximum and it is not D. What is it?

Answer 22

c... ? but c doesn't have 0.375, which is the answer you told me..

Answer 23

ohhh haha oaky

Answer 24

Looks like they rounded it.

Answer 25

The word "estimate" means an approximation.

Answer 26

Oh okay ! Thanks again (:

Answer 27

yess