Question

binomial expansion help!!!

Answer 1

the term 35x^3y^4 is term in which binomial expansion

Answer 2

list out your choices

Answer 3

ok

Answer 4

a. (x+y)^12
b. (x+y)^6
c. (7x+5y)^7
d.(x+y)^7

Answer 5

ok I see what they want

Answer 6

notice the exponents for 35x^3y^4 are 3 and 4

Answer 7

the exponents add to 3+4 = 7

so the degree of this polynomial is 7

Answer 8

yes

Answer 9

meaning that the overall outer exponent has to be a 7

Answer 10

oh.

Answer 11

so the answer is either c. (7x+5y)^7 or d.(x+y)^7

Answer 12

yes. im wondering if it is c because 7x5 is 35

Answer 13

do you have pascals triangle with you?

Answer 14

no should i print one out? thats probably why i am confused they ddint have it in my lesson

Answer 15

http://mathforum.org/workshops/usi/pascal/images/pascal.hex2.gif

Answer 16

look in the row that starts with 1, 7, etc

Answer 17

35x^3y^4 is the 4th term

what is the fourth number in that row?

Answer 18

ok

Answer 19

35

Answer 20

what is the fourth number in the row 1, 7, ....

Answer 21

yes

Answer 22

so if the answer was choice C, then we'd have

35*(7x)^3*(5y)^4 = 7,503,125x^3y^4

that result is way too big

Answer 23

choice C is out

Answer 24

so its D?

Answer 25

correct

Answer 26

wow. lol that was pretty easy

Answer 27

yeah it's easier with the triangle

Answer 28

like the z-scores haha

Answer 29

thansk :)

Answer 30

you're welcome