Question

Приведи дроби 13t/8k−9t и 17k/9t−8k к общему знаменателю. срочно пожалуйсто.
дам 50 баллов
​

Answer 1

$\frac{13t}{8k-9t} \; u \; \frac{17k}{9t-8k} \\\\\\1) \; \frac{13t}{8k-9t}=\frac{13t}{-(9t-8k)}=-\frac{13t}{9t-8k} \\\\\Rightarrow \; -\frac{13t}{9t-8k} \; u \;\frac{17k}{9t-8k} \; \checkmark\\\\\\3) \; \frac{13t}{8k-9t}=\frac{13t}{-(9t-8k)}=-\frac{13t}{9t-8k}=\frac{-13t}{9t-8k}\\\\\Rightarrow \; \frac{-13t}{9t-8k} \; u \;\frac{17k}{9t-8k} \; \checkmark$

.

$4) \; \frac{17k}{9t-8k}=\frac{17k}{-(8k-9t)}=-\frac{17k}{8k-9t}=\frac{-17k}{8k-9t}\\\\\Rightarrow \; \frac{13t}{8k-9t} \; u \;\frac{-17k}{8k-9t} \; \checkmark\\\\\\7) \; \frac{17k}{9t-8k}=\frac{17k}{-(8k-9t)}=-\frac{17k}{8k-9t}\\\\\Rightarrow \; \frac{13t}{8k-9t} \; u \; -\frac{17k}{8k-9t} \; \checkmark$