Question

Directions: Click on "2nd Level". How can you prove that b - a is the negative of a - b?

Answer 1

do u kno geometry

Answer 2

no this is in my common core algebra class

Answer 3

common core eh ... you cant prove nothing in common core :/

Answer 4

its wat my class is called

Answer 5

-(a-b) = b-a

0 = (b-a) + (a-b)

0 = b +(-a + a) -b

0 = b +0 -b

0 = b -b

0 = 0, is ture

Answer 6

of course you would have to name each step according to its mathical property

Answer 7

what is (2xy) times (9x+9)

Answer 8

i think it is 18xy+18xy but im not sure