Question

Choose the correct sum of the polynomials (2x3 − 5x − 1) + (4x3 + 8x + 3).

2x3 − 3x − 4

6x3 + 3x + 2

2x3 + 3x + 2

6x3 − 3x − 2

Answer 1

2x^3 + 4x^3 = ???

Answer 2

do you know what I'm asking?

Answer 3

Add like terms

Answer 4

(2x3 − 5x − 1)
+ (4x3 + 8x + 3)
--------------------

Answer 5

18+3x+2?

Answer 6

im lost

Answer 7

2x^3 + 4x^3 = 6x^3

you just add the coefficients or the numbers in front

Answer 8

the same is done for -5x and 8x

Answer 9

and the constant terms as well: -1 and 3

Answer 10

yeah and I got 18+3x+2

Answer 11

Not sure how you got the 18


(2x^3 - 5x - 1) + (4x^3 + 8x + 3)


2x^3 - 5x - 1 + 4x^3 + 8x + 3


(2x^3 + 4x^3) + (-5x + 8x) + (-1 + 3)


(6x^3) + (3x) + (2)


6x^3 + 3x + 2

Answer 12

thank you!

Answer 13

oh wait I see now, you did 6 times 3 = 18

but 6x^3 doesn't mean that (it does get a bit confusing)

Answer 14

yw though