SOLUTION: perform the indicated operation 5/3a - 9 - 3/2a + 4/a^2 -3a Is this where you find the LCD and then go from there? 3= 3 9 = 3^3 2= 2 largest ones = 3^3 * 3 * 2 =

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: perform the indicated operation 5/3a - 9 - 3/2a + 4/a^2 -3a Is this where you find the LCD and then go from there? 3= 3 9 = 3^3 2= 2 largest ones = 3^3 * 3 * 2 =       Log On


   

Question 7943: perform the indicated operation

5/3a - 9 - 3/2a + 4/a^2 -3a

Is this where you find the LCD and then go from there?
3= 3
9 = 3^3
2= 2
largest DISABLED_event_ones= 3^3 * 3 * 2 = 54a^2

Book answer is: a + 51/ 6a(a-3)
Pleae help. Thanks to all
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
you have to write it down correctly on here, anywhere even: maths is a language and if you speak it incorrectly, then others will mis-interpret you: To get the answer you quoted, you need 5%2F%283a-9%29+-+3%2F2a+%2B+4%2F%28a%5E2-3a%29

5%2F%283%28a-3%29%29+-+3%2F2a+%2B+4%2F%28a%28a-3%29%29

To alter any fraction, beit a numerical or algebraic fraction, you need to scale it up. We do this by multiplying by "1", to keep the actual fraction unchanged, but we write 1 as something like a/a...

Right then, looking at all the denominators, we need to get them all the same: the LCM is 6a(a-3)...so

first term is multiplied by %282a%29%2F%282a%29
second term is multiplied by %283%28a-3%29%29%2F%283%28a-3%29%29
third term is multiplied by %286%2F6%29

so we then get:

%2810a+-+3%283%28a-3%29%29+%2B+24%29%2F%286a%28a-3%29%29
%2810a+-+3%283a-9%29+%2B+24%29%2F%286a%28a-3%29%29
%2810a+-+9a+%2B+27+%2B+24%29%2F%286a%28a-3%29%29
%28a+%2B+51%29%2F%286a%28a-3%29%29

jon.