Question

(algebra II) can someone show me how to multiply and reduce http://goo.gl/fvjmyI ? Why is the answer (3b)/a ?

Answer 1

what you want to think of is that anything divided by itself = 1
Ex: \[\frac{ x }{ x }=1\]

Answer 2

here is an easy explanation:
multiply to get this------>270a^2b^3/90a^3b^2

Answer 3

so to make things clearer you want to look at your problem as
\[\frac{ 6a ^{2} }{ 5b ^{2} }\times \frac{ 45b ^{3} }{ 18a ^{3} }=\frac{ 6*a*a*45*b*b*b }{ 5*b*b*18*a*a*a }\]

Answer 4

i thought i have to factor

Answer 5

no what you need to do is reduce, do you know how?

Answer 6

no i dont know

Answer 7

let me try this @eescobedo1

Answer 8

where did you get 270a^2b^3/90a^3b^2

Answer 9

ok reducing is basically cancelling out any common variables (which are your letters) and numbers, so if you recall x/x=1, therefore a/a=1 and b/b =1 so you want to cancel out what ever they have in common, am I making sense?