Question

can anyone help me please

Answer 1

yea sure

Answer 2

atleast hopefully ahah

Answer 3

@tejasvir

Answer 4

just do synthetic division. are u familiar with that?

Answer 5

yes

Answer 6

okay so if its a factor and you do sinthetic division you should get zero as a remainder.

Answer 7

can you do that for me please i don't know why i keep doing this wrong

Answer 8

okay sure! lets start from the bottom. let me know what you get and ill tell you if that is what i got or not

Answer 9

im not sure but that isnt synthetic division. have you learnt what synthetic divison

Answer 10

no not yet sorry
i thought the other things

Answer 11

hmm. well i dont want to deviate from what you've already learnt. but is it okay if i show you an easier and faster way?

Answer 12

yeam :)

Answer 13

okay sorry my computer died.

Answer 14

no problem

Answer 15

okay so heres the super easy way to solve it and you can impress your teacher if you havent already learnt it haha:)

Answer 16

okay so what you do is set each of the answer choices equal to zero and solve for x okay? u with me so far?

Answer 17

yes of course :)

Answer 18

okay cool so then what did you get when you solved for x for each of the answer choices except for a.?

Answer 19

good! okay thats what i got aswell. so what you do know is plug each of the answers you got into the original equation. if you get a zero as an answer for any of them. then you know thats a factor! does that make sense?

Answer 20

when x=-2 i got 0

Answer 21

Then that means x+2 IS a factor

Answer 22

exactly so find the one that doesnt equal zero and thats the answer

Answer 23

so x - 2 is answer

Answer 24

yay good job!!:)

Answer 25

thank a lot

Answer 26

can you help me in another question "if you don't mind"

Answer 27

okay im not sure how to go about answer choice a but i will look it up and let you know. i feel like you plug in zero for the equation but im not a hundred percent sure.

Answer 28

actually, i would factor to solve this problem

all three terms have a 5x in common.
so
\[5x(2x ^{2}-x-10)\]

Answer 29

then factor whats in the parenthesis
and you'll get (2x-5)(x+2)

Answer 30

yeha this is another to solve this

Answer 31

if you dont know how to factor it, i just multiplied the first and thrid term which = -20
and the middle term is -1

so you;re looking for two numbers that multiply to -20 but also add up to -1
and that would be -5 and 4