Question

7. Efectuați înmulțirile:​

Answer 1

Explicație pas cu pas:

a)

$= \dfrac{5x}{3y}$

b)

$= - \dfrac{3}{10}$

c)

$\dfrac{2 \not y}{\not3 \not x} \cdot \dfrac{\not6 \not x}{7\not y} = \dfrac{2 \cdot 2}{7} = \dfrac{4}{7}$

d)

$- \dfrac{{x}^{\not2} }{\not y} \cdot \dfrac{{y}^{\not3} }{\not x} = - x {y}^{2}$

e)

$\dfrac{x + 1}{x + 2} \cdot \dfrac{ \not 3}{x + 1} \cdot \dfrac{x + 2}{ - \not 6} = - \dfrac{1}{2}$

f)

$= \dfrac{a(x + y)}{x(x - 4)} \cdot \dfrac{x - 4}{x + y} = \dfrac{a}{x}$

g)

$= \dfrac{(x - 2) (x + 2)}{(x - 1)(x + 1)} \cdot \dfrac{x - 1}{x(x + 2)} = \dfrac{x - 2}{x(x + 1)}$