[tex] \frac{2}{7} {x}^{10} {y}^{4} \: and \: \frac{2}{14} {x}^{8} {y}^{7} \\ lcd = 14 {x}^{10} {y}^{7} [/tex]
Answer is
[tex]14 {x}^{10} {y}^{7} [/tex]
When it's powered numbers, remember to choose the one with the largest power. For example,
[tex] {x}^{10} [/tex]
And
[tex] {x}^{8} [/tex]
Choose 10, same goes to y, where you choose 7 not 4 since 7 is larger.
Hope this helps. - M
