Use pascals triangle to expand each binomial

(a+b)^8

Question

Use pascals triangle to expand each binomial 

(a+b)^8

nnesha · Answer

http://prntscr.com/777cch rows start from 0 what numbers are in 8 row ? exponent is 8 so second number of row suppose to be 8

anonymous · Answer

8,28,56,70,56,28,8

rational · Answer

Yes! don't forget the "1"'s in the ends

anonymous · Answer

Oh yeah, i forgot

anonymous · Answer

What do i do next? Do i plug in numbers to the equation?

rational · Answer

that row gives you the coefficifents

rational · Answer

$$\large (a+b)^8=\square a^8+\square a^7b+\square a^6b^2+\cdots$$

rational · Answer

put those numbers in above boxes and keep going

anonymous · Answer

Oh okay thanks

rational · Answer

np
may i see what you get in the end

anonymous · Answer

I saw that a's exponents are decreasing and b's exponents were increasing.

a^8 + 8a^7b + 28a^6b^2 + 56a^5b^3... + b^8

nnesha · Answer

yes that's right 
exponent of first term start from given exponent 
exponent of 2nd term start from  0

rational · Answer

looks good!
also notice that the exponents add up to "8" for all terms

rational · Answer

please medal Nnesha, not me

nnesha · Answer

please don't :-)

anonymous · Answer

I am using openstudy on my phone. Its not making me change the medal

nnesha · Answer

you don't have to :/
& btw it DOESN'T   matter ........