Question

ok

Answer 1

Since -12 is negative we know that one value is positive and the other is negative.
(x - 6) ( x + 2)

Answer 2

\ (o_o) /

Answer 3

the same thing goes for -4x, only -6 + 2 would result in -4.

Answer 4

What he said.

Answer 5

You just need to look at bx + c,
if c is positive and b is negative then the numbers in (x-h)(x-k)
are negative
if c is positive and b is positive then the numbers are positive
if c is negative and b is negative then one of the numbers is negative and the other is positive.