Question

for this x2 - 12x + 27 how do you know if its (x+3) or (x-3) the plus and minus confuse me :s

Answer 1

x1.x2=27
x1+x2=12

Answer 2

so x1=3 and x2=9

Answer 3

when you made x=x1or x2 you must get a zero

Answer 4

so p(x)=(x-x1).(x-x2)

Answer 5

@RaphaelFilgueiras (x + 3)

(x + 9)

(x – 3)

prime these are the choices it gave me.

Answer 6

so p(x)=(x-3).(x-9)

Answer 7

ok thanks c: @RaphaelFilgueiras

Answer 8

you are welcome