Question

Combine like terms.
(-3y2 - 7y - 9) - (4y2 + 6y + 9)

Answer 1

can you get rid of the parentheses? multiply everything in that right term by -1 ?

Answer 2

No /: i cant..... and all rite thanks

Answer 3

well, to complicate it a little before we simplify it, that thing means
\[(1)(-3y^2-7y-9)+(-1)(4y^2+6y+9)\]

Answer 4

on that first part, multiplying by 1 is easy.... everything stays the same
but on that second part, you multiply everything by -1... which flips the sign

Answer 5

can you get rid of those parentheses now?

Answer 6

ohh yaa i think i got it now, thanks