Question

simplifique:

a) 7X X
__ * __
2a 3c

b) X+y X-y
__ * __
5 2

c) 5X X X²
* __* __
2 8

d) 9 X-1
__ * ___
x-1 x+1

Answer 1

Vamos lá:

a) $\frac{7x}{2a}.\frac{x}{3c} \\ \frac{7x^2}{6ac}$
b) $\frac{x+y}{5}.\frac{x-y}{2} \\ \frac{(x+y)(x-y)}{10} \\ \frac{x^2-y^2}{10}$
c) $\frac{5x}{2}.\frac{x}{8}.x^2 \\ \frac{5x.x.x^2}{2.8} \\ \frac{5x^4}{16}$
d) $\frac{9}{x-1}.\frac{x-1}{x+1} \\ \frac{9}{x+1}.\frac{x-1}{x-1} \\ \frac{9}{x+1}.1 \\ \frac{9}{x+1}$

Espero ter ajudado.