Question

x^2-10x+9

Answer 1

what's the question?

Answer 2

try these possibilities in first column to get + 9

-3 x -3
-9 x -1

and see which give you -10

Answer 3

oh okay i was thinking it would be (x-3) (x+3) ?

Answer 4

i guess you wanna factor it...
no...

Answer 5

yeah factorise quadratics

Answer 6

there's only two possiblilities but only 1 of them adds to -10.... see what @cwrw238 suggested...

Answer 7

they both add up to 9 dont they

Answer 8

(-3) + (-3) = ??
(-9) + (-1) = ???

try it now...

Answer 9

ohh its -9+-1 but the answer is -10 and i thought it should be positive 10

Answer 10

-10 is the coefficient of the middle term. they have to "add" up to this
+9 is the last coefficient. they have to "multiply" up to this

and so:
(-9) * (-1) = +9 and
(-9) + (-1) = -10

so this is it...

Answer 11

oh yeah al right so its the second one

Answer 12

yes... so how is it factored?

x^2-10x+9 = ( )( ) ????

Answer 13

(x-9)(x-1)

Answer 14

good work... :)

Answer 15

:) thank you!

Answer 16

yw...:)

Answer 17

-9+-1+=10
_9*-1=9
x^2-10x+9
=(x-9)(x-1)