Question

What are the expressions in factored form?
1)x^2-64
2)9x^2-18x+9
3)16x^2-25

Answer 1

in case of first just yous formula of difference of two squares - do you know it ?

Answer 2

ohhh and for 3rd same too

Answer 3

no, is there a broad method to find out the answers, and is it the easiest

Answer 4

so than you know this formuela this is the easy way sure

this is the formula for difference of two squares

a^2 -b^2 =(a-b)(a+b)

Answer 5

looks familiar

Answer 6

just use it

for the first will be

x^2 -64 = (x-8((x+8)

yes ?

Answer 7

for 3rd will be the same easy

16x^2 -25 = (4x)^2 -5^2 = ?

Answer 8

so do you square root always?

Answer 9

sorry above changed the paranthese there is (x-8)(x+8)

Answer 10

oh ok

Answer 11

in this case yes bc. there are square perfect and this is why you can using this formula easy

Answer 12

what if they don't square out perfectly?

Answer 13

so for second one

9x^2-18x+9 =0 how you see what can you factorizing out from every 3 terms of quadratic ?

Answer 14

a 9

Answer 15

yes please make it and see what will get - ok. ?

Answer 16

ok

Answer 17

here please

Answer 18

oh well I ended up with 9(x^2-2x+1) I don't know what to do after

Answer 19

x^2 -2x +1 =0 so you dont see it nothing here now just bc. this quadratic is a square perfect or not ?

Answer 20

looke please (x-1)^2 = ? how many will give you ?

Answer 21

oh yeah, but what do you do with the 9?

Answer 22

so 9 will be there in front of the first paranthese - ok ?

Answer 23

ok so would the answer be (9x-1)(x-1)??

Answer 24

no

i said above in front of the first paranthese not inside

Answer 25

so 9(x-1)(x-1)?

Answer 26

yes but hence is more nicely

9(x-1)^2

or not ?

Answer 27

yeah

Answer 28

ok

was my pleasure

good luck

bye bye

Answer 29

thank you

Answer 30

np

anytime