Question

factor r^2-r-6
is the answer r=2 r=3?

Answer 1

no
when multiplied the 2 numbers must = -6

Answer 2

so then they should be negatives?

Answer 3

one should be negative and the other positive
and their sum must be -1 ( because middle term is -r)

Answer 4

so negative 2 and positive 3?

Answer 5

no that would give -2 + 3 = +1

Answer 6

oh ok then, negative 3 and positive 2 sorry

Answer 7

yes
r^2 - r - 6
= r^2 -3r + 2r - 6
= r(r - 3) + 2(r - 3)
= (r - 3)(r + 2)


- these are the factors not r = 3 and r = -2 which are the zeros of the function

Answer 8

ok, thanks