Question

x^2 – 16x + 15 = 0

Answer 1

Hello, Welcome to OpenStudy

Answer 2

hello

Answer 3

does it really matter?

Answer 4

?

Answer 5

can you help e with y question or not?

Answer 6

*me with my question

Answer 7

sure

Answer 8

are you being helped?

Answer 9

ignore luck4u she seems to be spamming

Answer 10

what the heck!

Answer 11

@dpaInc please help her, i am working on another question

Answer 12

what does that even mean

Answer 13

ok and dpalnc no :(

Answer 14

ok...

Answer 15

is the problem to factor: x^2 – 16x + 15 = 0

Answer 16

no i think its to find x

Answer 17

oh yeah... sorry, we can accomplish that by factoring...
can you factor the left side? write it in this fashion?

x^2 – 16x + 15 = 0
( ) ( ) = 0

Answer 18

he first thing to go in those binomials is x because that's the only way to get x^2....

(x ) (x ) = 0

Answer 19

now you need to figure out what multiplies to 15 and at the same time add up to -16. can you figure that out?

Answer 20

yeah sorry im just slow when it comes to math

Answer 21

that's ok... take your time and try it out.... that's why you're here....

Answer 22

actually, this is the part where a lot of people have trouble because it is a bit of guess and check. lemme help you...

Answer 23

thank you

Answer 24

what multiplies to 15? let's try 3 and 5... so the factoring will look like this:
(x + 3) (x + 5)
but notice 5x and 3x will add up to only 8x (the middle part of the trinomial)

so 3 and 5 will not work, agreed?

Answer 25

yes

Answer 26

can you think of another way to multiply two numbers to get 15? (other than 3 * 5)