Question

simplify the expression 9xy2- 11xy2

Answer 1

I got -40xy

Answer 2

i can't tell if that's 9xy^2-11xy^2 or (9*x*y*2)-(11*x*y*2)

Answer 3

its a 2 over the y

Answer 4

its above the y

Answer 5

I got -40xy

Answer 6

i multiplied everything

Answer 7

Consider xy² as som strange foreign currency: YOu have 9xy² and you have to pay 11xy².

Where does this lead to?

Answer 8

multiply right

Answer 9

and then subtract both the numbers u multiplied

Answer 10

Hey, no tricks! You have to pay! You only have 9xy² and you have to pay 11xy², so you are 2xy² short...or:

-2xy²

Answer 11

So there is nothing to multiply. You just have two amounts of xy² that have to be subtracted. Result -2xy²

Answer 12

Hey @acullen: have you read my explanation?