???? If (2x-3y)^10 is multiplied out and simplified, find the sum of all the coefficients.   ????

⚑ Flag

ah u have to know permutations and combinations & binomial expansion theorem thing. but that question is amazingly long and i cant do on this page. usually it wont ask this one in an exam.  u have to factor out all coefficients and add them. check the example on the site below. 

? uh heres a joke.What do you get if you lose a car?Carlos!HA HA HA!