Question

СРОЧНО, ПОМОГИТЕ ПОЖАЛУЙСТА!​

Answer 1

1.=a(a+4)

(a+4)квадрат =a

(a+4) = -2

(-2+4) =-1

Answer 2

$1) \frac{ {a}^{2} + 4a }{ {a}^{2} + 8a + 16} = \frac{a(a + 4)}{(a + 4) {}^{2} } = \\ \frac{a}{a + 4} = \frac{ - 2}{ - 2 + 4} = - \frac{2}{2} = - 1$

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

$\frac{4 - 2}{2 \times 2} = \frac{2}{4} = 0.5$

$3) \frac{10x}{2x - 3} - 5x = \\ \frac{10x - 5x(2x - 3)}{2x - 3} =$

$\frac{10x - 10 {x}^{2} + 15x}{2x - 3} = \frac{25x - 10 {x}^{2} }{2x - 3}$