How you think... well, you have to find two numbers whose sum is -5 and whose product is -36 : and .
I don't think there's an easier way to determine the sign of that expression (I hope that's what you asked) than the traditional one.
30x^3y-25x^2y^2-30xy^3
i did all the work but when i got down to
5xy(6x^2-5xy-6y^2)
it took me forever to get the answer
5xy(3x+2y)(2x-3y)
is there a faster way to determine which part of 2y and 3y are negative to get the answer? It took me an hour just to find the answer to this!
How you think... well, you have to find two numbers whose sum is -5 and whose product is -36 : and .
I don't think there's an easier way to determine the sign of that expression (I hope that's what you asked) than the traditional one.