Question

What are the roots in the following coordinates?
-9x^2+18x+27=0

Answer 1

factor out the -9
\[-9(x^2-2x-3)=0\]
now factor the quadratic

Answer 2

two numbers whose
product = -3
sum = -2

Answer 3

i dont know how to factor.

Answer 4

not to worry.
what two numbers
multiply to give -3
and add to give -2?

Answer 5

(-3)
and
(1)

right?

Answer 6

yeah

Answer 7

so, your factors become
\[-9(x-3)(x+1)=0\]

Answer 8

so then your answer would be 3 & 1?

Answer 9

check again
with the signs

Answer 10

-3 & 1?

Answer 11

when can the factors become "zero"?