Предмет: Алгебра, автор: BastiDaniluk

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Автор ответа: McProfessor
1

3. Виконайте ділення:

1)

 \frac{14 {m}^{2}n }{5 {b}^{2} }  \div ( - 7m {n}^{2} ) =  -  \frac{14 {m}^{2} n}{5 {b}^{2} \times 7m {n}^{2}  }  =  -  \frac{2m}{5 {b}^{2}n }

2)

 \frac{6m - 2}{15 {p}^{2} }  \div  \frac{1 - 9 {m}^{2} }{25 {p}^{3} }  =  \frac{(6m - 2)25 {p}^{3} }{15 {p}^{2}(1 - 9 {m}^{2} ) }  =  \frac{2(3m - 1)5p}{ 3(1 - 3m)(1 + 3m)}  =  -  \frac{2(1 - 3m)5p}{3(1 - 3m)(1 + 3m)}  =  -  \frac{2 \times 5p}{3(1 + 3m)}  =  -  \frac{10p}{3 + 9m}

4. Розв'яжіть рівняння

 \frac{ {x}^{2} - 16 }{x + 2}  = 0 \\  {x}^{2} - 16 = 0 \\  {x}^{2}   = 16 \\ x = 4 \:  \:  \: x =  - 4

Пояснення до 4 завдання:

  •  \frac{f(x)}{g(x)}  = 0 \\ f(x) = 0


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