Question

Factor the following polynomial: x2 - 20x + 36
(x - 6)(x - 6)
(x + 6)(x + 6)
(x - 18)(x - 2)
(x + 18)(x + 2)

Answer 1

try FOIL ing out all those to see what u get....

Answer 2

only one of those choices work....

Answer 3

Yeah it's harder to explain the factoring part

Answer 4

For foiling: http://www.purplemath.com/modules/polymult2.htm

Answer 5

good tip.... ^^^

Answer 6

For factoring: http://www.purplemath.com/modules/factquad.htm

Answer 7

purplemath has everything you need to know in these cases