ugh, i can't seem to get this adding and subtracting polynomials stuff. (7b^2−2b+3)−(5b^2−4+b^4 )−(9b^4+6)
my answer was 10b^4+8b^2-2b+13

Question

ugh, i can't seem to get this adding and subtracting polynomials stuff. (7b^2−2b+3)−(5b^2−4+b^4 )−(9b^4+6)
my answer was 10b^4+8b^2-2b+13

evansanchez · Answer

2b^2-10b^4-2b+1

evansanchez · Answer

answer

nerdybirdy6661 · Answer

yeah i know the answer, i have the answer sheet, i just don't know how to get there

lifeisadangerousgame · Answer

Here's what you do first, nerdy. Distribute the subtraction signs to the polynomials so that you can get started. Keep everything as neat as possible. What I mean by that is multiply -1 to  (5b^2−4+b^4 ) and (9b^4+6) and then write what you have

lifeisadangerousgame · Answer

After that, add/subtract like terms and see what you end up with. I have to go eat, I'll be back quite some time later :/

directrix · Answer

(7b^2−2b+3)−(5b^2−4+b^4 )−(9b^4+6) =

7b^2 - 2b + 3 - 5b^2 + 4 - b^4 - 9b^4 - 6 =

-b^4 - 9b^4 +7b^2 - 5b^2 + 3 + 4 - 6  =

directrix · Answer

-b^4 - 9b^4 +7b^2 - 5b^2 + 3 + 4 - 6 =

-10 b^4 + 2b^2 - 2b + 1