Question

@Michele_Laino

Answer 1

hint:
if we apply the distributive property at the second parenthesis, we can write this:
\[3\Large {x^2} - x - 2 + 5{x^2} + 2x + 4 = ...?\]
please simplify

Answer 2

oops.. I meant parentheses*

Answer 3

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

Answer 4

hint:
the first two terms are correct!
for the third one, please note that we have \(-2+4\)

Answer 5

Why would +2 be -2?

Answer 6

since the first polynomial, is:
\[3{x^2} - x - 2\]

Answer 7

so we have:
\(-2+4=2\)

Answer 8

alright

Answer 9

so, what is the right option?

Answer 10

c

Answer 11

that's right!!