Question

ok 3/y-1 + 5/4y I just need help to figure out the LCM of the denom

Answer 1

\[5y(y-1)\]

Answer 2

that's the answer or the LCM?

Answer 3

lcm

Answer 4

how did you figure that out? is there a trick?

Answer 5

\[\frac{3}{y-1}+\frac{5}{4y}=\frac{3(4y)+5(y-1)}{y-1}\]
\[=\frac{12+5y-5}{4y(y-1)}=\frac{5y+7}{4y(y-1)}\]

Answer 6

no trick, if there are no common factors you have to multiply the denominators together.

Answer 7

just like if i had
\[\frac{3}{5}+\frac{5}{11}\] i would have to multiply the denominators together

Answer 8

ok well thank you:)

Answer 9

yw