Question

Factor the trinomial.
16 – 6y – y^2

Answer 1

-y^2-6y+16
y^2+6y-16
(y+8)(y-2)

Answer 2

it's telling me it's wrong

Answer 3

Going step by step, you know the y^2 is negative, so it will factorise as (a+y)(b-y). Now just find two numbers, a and b, so that when you expand it you get 16-6y-y^2

Answer 4

Did that make sense so far? And, can you do the next step or do you need a clue?

Answer 5

im gonna take another shot at it. i was mixing around a few numbers before but i couldn't get anything to work

Answer 6

Remember that (y+_)(y+_) will always give you a positive y^2, so to get a negative y^2 you need (_+y)(_-y).

Answer 7

yep

Answer 8

Where _ just stands for random numbers

Answer 9

Also notice that a and b will have to multiply to make 16, which makes your choices quite simple.

Answer 10

(8+y)(2-y)

Answer 11

Perfect!

Answer 12

danka

Answer 13

If you want to do it a different way, do what aroub did earlier by multiplying by -1, but remember at the end that you need to times one of the factors by -1 to get a -y in there :D

Answer 14

You're most welcome :D