Question

Допоможіть будь ласка.
Приклади закріплені ​

Answer 1

Ответ:

1) y+1/3y

2)3c²-12c-32/12c²

3)4x/x²-16

4)3b-3a/ab

Answer 2

$\frac{y + 2}{6y} + \frac{y}{6y} = \frac{y + 2 + y}{6y} = \frac{2y + 2}{6y} = \frac{2(y + 1)}{6y} = \frac{y + 1}{3y}$

$\frac{c - 4}{4c} - \frac{8}{3 {c}^{2} } = \frac{3c(c - 4) - 8 \times 4}{12 {c}^{2} } = \frac{3 {c}^{2} - 12c - 32 }{12 {c}^{2} }$

$\frac{ {x}^{2} }{ {x}^{2} - 16 } - \frac{x}{x + 4} = \frac{ {x}^{2} - x(x - 4) }{(x - 4)(x + 4)} = \frac{ {x}^{2} - {x}^{2} - 4x}{ {x}^{2} - 16 } = - \frac{4x}{ {x}^{2} - 16 }$

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