Question

A polynomial has been factored, as shown below:

f(x) = (x − 3)(x + 8)(x − 11)

What are the zeros of the polynomial?
3, 8, 11
3, −8, 11
−3, 8, −11
−3, 3, −8, 8, −11, 11

FAN AND MEDAL PLZ HELP

Answer 1

split the function into three pieces:

(x-3) = 0
(x+8) = 0
(x-11) = 0

solve for x

Answer 2

i dont know how to do that at all...

Answer 3

(x-3) = 0

what is x?

Answer 4

@pooja195 @willsgirl16 @Mehek14 @mathsterman

Answer 5

sorry um x = 3? right

Answer 6

yes, now keep going with the other two

Answer 7

(x+8) = 0

x = ?

Answer 8

x= 11 x = -8?

Answer 9

yup, so those are your zeros

x = 3, x = 11, x = -8

Answer 10

WOW THANKS A LOT WOOHOO DIDNT KNOW IT WAS THAT EASY CAN U HELP WITH MORE???

Answer 11

sure I guess

Answer 12

What are the factors of 3x2 + 23x − 8?
(3x − 4)(x + 2)
(3x − 2)(x + 4)
(3x − 8)(x + 1)
(3x − 1)(x + 8)

Answer 13

@Vocaloid

Answer 14

do u know???

Answer 15

theres two more if u dont know this one lol :))))

Answer 16

use foil method to expand each one

Answer 17

idk how to do that...

Answer 18

can we come back and u explain later?

Answer 19

i have moere

Answer 20

more*

Answer 21

sure I guess

Answer 22

Factor the GCF: −6m2 + 18m − 36.
−6(m2 − 3m + 6)
−1(6m2 − 18m + 36)
−6m(m2 − 3m + 6)
−6(m2 + 3m − 6)

can u just give the answer then explain for both im in the middle of a lesson and its about to end lol :))

Answer 23

hint: the greatest common factor is 6, so we divide each term by 6 and write 6 outside

Answer 24

we can also factor out -1, which reverses each of the signs inside the parentheses

Answer 25

so witch one are you on? im leaning towards c

Answer 26

@vocaloid

Answer 27

it's not c
you can't factor out m since not every term has m in it (36 doesn't have m)

Answer 28

b!

Answer 29

like I said before...

the GCF is -6 which goes on the outside of the parentheses... then we reverse the signs

Answer 30

ok so witch one???

Answer 31

nonono its A!!! @vocaloid

Answer 32

i divided all of em

Answer 33

right...

Answer 34

What are the factors of 3x2 + 23x − 8?
(3x − 4)(x + 2)
(3x − 2)(x + 4)
(3x − 8)(x + 1)
(3x − 1)(x + 8)

this one? @vocaloid

Answer 35

multiply each of the answer choices out to see which one matches the original

hint: (A-B)(C+D) = A*C + A*D - B*C - B*D

Answer 36

so, using our first answer choice as an example...

(A-B)(C+D) = A*C + A*D - B*C - B*D
(3x − 4)(x + 2) = (3x)(x) + 2(3x) - 4*x - 8 = 3x^2 + 2x - 8 which does NOT match the original so we keep going

Answer 37

ok so its not a.. how do u find like the a*c and etc..?

Answer 38

you match up the numbers....

Answer 39

compare: (A-B)(C+D) = (3x − 4)(x + 2)

Answer 40

A = 3x, B = 4, C = x, and so on...

Answer 41

ahhh ok ill try one second thanks

Answer 42

4x + d)(4x -6) ????? @Vocaloid

Answer 43

I'm not sure where you're getting those numbers...

Answer 44

(3x-2)(x+4) = (A-B)(C+D)

Answer 45

ohhhh

Answer 46

first tell me what A, B, C, and D are

Answer 47

a= 3 b = -2 c = x d = 4?

Answer 48

am i right

Answer 49

check A and B again

Answer 50

I dont have any time can u just tell me and explain because im getting really confused

Answer 51

please please please

Answer 52

THANK YOU SO MUCH OMG YOU'RE A LIFE SAVER HOLY CRAP

Answer 53

C = x, D = 4

Answer 54

now use our formula...

Answer 55

(A-B)(C+D) = A*C + A*D - B*C - B*D

Answer 56

OH OK 4x + 12 and -2x - 8???

Answer 57

is that right?

Answer 58

i got it wrong didnt i :C

Answer 59

plz just tell me the answer im horrible at this... @Vocaloid

Answer 60

What are the factors of 3x2 + 23x − 8?
(3x − 4)(x + 2)
(3x − 2)(x + 4)
(3x − 8)(x + 1)
(3x − 1)(x + 8)

@willsgirl16 help meh