Предмет: Алгебра, автор: nomemeses

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Автор ответа: amazonka007

0

1) а)
$frac{2b+18}{b^2-81}= frac{2(b+9)}{(b-9)(b+9)}=frac{2}{b-9}$
в)
$frac{1}{2} sqrt{144}+1.5 sqrt{0.04}= frac{1}{2}*12+1.5*0.2=6.3$
2) x≠3
2x+6=0
2x=-6
x=-3
x-2=0
x=2
ответ: -3, 2
3.
$frac{3a+2b-3a+2b+6a}{2(3a-2b)(3a+2b)}= frac{2(3a+2b)}{2(3a-2b)(3a+2b)} = frac{1}{3a-2b}$

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Автор ответа: nomemeses

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Спасибо!

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