Algebra I Sem 2 2 1.2.3 Quiz: Adding and Subtracting Polynomials
Question 8 of 10
Find the sum: (12 +24+ 3) + (312 + x + 1)
A. 442 + 3%+4
O B. 442 +34+4
O C. 4A + 4x+3
O D. 3A + 4x+3

x + 352

Step-by-step explanation:

Simplify the following:

12 + 24 + 3 + 312 + x + 1

Grouping like terms, 12 + 24 + 3 + 312 + x + 1 = x + (12 + 24 + 3 + 312 + 1):

x + (12 + 24 + 3 + 312 + 1)

| | 1 |  

| 3 | 1 | 2

| | 2 | 4

| | 1 | 2

| | | 3

+ | | | 1

| 3 | 5 | 2:

 x + 352

c) yes, because of asa or aas

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!