Question

1. What is the degree of hte monomial 15x^3y^9?
A) 12
B) 3
C) 9
D) 15

2. What is the difference?
10c^3 - 8c^3
A) 18c^3
B) 2c^3
C) 3c^6
D) -80c^6

3. What is the sum?
16x^3 + 9x^3
25x^6
25x^3
7x^3
24x^6

Answer 1

lets start with #1

add the exponents together

Answer 2

@Vocaloid 12

Answer 3

good, so thats the degree

Answer 4

ready for #2?

Answer 5

Yes

Answer 6

ok, this is just combining like terms

if 10 - 8 = 2, then what is 10c^3 - 8c^3 = ?

Answer 7

@Vocaloid 2c^3

Answer 8

good!

Answer 9

ready for the next one?

Answer 10

Yes

Answer 11

16 + 9 = 25

16x^3 + 9x^3 = ?

(the exponent stays the same)

Answer 12

@Vocaloid 25x^6

Answer 13

nope, remember what I said, the exponent stays the same

Answer 14

Oh okay. Could you help me with a few more?

Answer 15

sure

Answer 16

4. Find the difference.

(9a^4 + 2a^2 + 5) - (16a^4 - 7a^2 + 1)

A) 25a^4 - 5a^2 - 4
B) -7a^4 - 5a^2 + 6
C) 25a^8 + 9a^4 + 6
D) -7a^4 + 9a^2 + 4

Answer 17

start by combining like terms

9a^4-16a^4 = ?

Answer 18

9a^6 ?

Answer 19

nope

Answer 20

9-16 = ?

Answer 21

7

Answer 22

nope

Answer 23

16-9 =7

Answer 24

right, but I asked 9-16, not 16-9

Answer 25

9-16= -7

Answer 26

good!

so, any ideas on what 9a^4 - 16a^4?

(remember, when we add/subtract terms with exponents, the exponents don't change)

Answer 27

still there?

Answer 28

@Vocaloid Hey, sorry I'm back now

Answer 29

good, so 9a^4 - 16a^4 = ?

Answer 30

@Vocaloid -7a^4

Answer 31

good, now work on the a^2 term

2a^2 + 7a^2 = ?

Answer 32

-7a^-4 + 9a^2 + 4

Answer 33

good!!