(2a+5a²)+(2a-a²)

cual es el resultado ​

Step-by-step explanation:

1) Remove parentheses.

2) Collect like terms.

3) Simplify.

Therefor, the answer is, 4a + 4a².

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

1. 3

2. 4

3. 1

hope this ! have a great day.

-wfz