Найти значение выражения: 3а/а²-9 - 2b/аb+3b - b/ab-3b. Created by elena5filatowa. algebra-ru

ab-3b...

elena5filatowa @elena5filatowa

July 2022 1 7 Report

Найти значение выражения:
3а/а²-9 - 2b/аb+3b - b/ab-3b

Answers & Comments

nafanya2014

Verified answer

$\frac{3a}{a^2-9} -\frac{2b}{ab+3b} -\frac{b}{ab-3b}= \frac{3a}{(a-3)(a+3)} -\frac{2b}{b(a+3)} -\frac{b}{b(a-3)}=\frac{3ab-2b(a-3)-b(a+3)}{b(a-3)(a+3)} =\frac{3b}{a^2-9}$

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