Question

se consideră expresia
repede va rog frumos ​

Answer 1

Răspuns:

$\frac{3(x-2)+2}{x-2}$×$\frac{x^{2} -4x+4}{(2x-3)^{2}-(x-1)^{2} }$

$\frac{3x-6+2}{x-2}$×$\frac{(x-2)^{2} }{(2x-3-(x-1))x(2x-3+(x-1))}$

$\frac{3x-4}{x-2}$×$\frac{(x-2)^{2} }{(2x-3-x+1)x(2x-3+x-1)}$

$\frac{3x-4}{x-2}$×$\frac{(x-2)^{2} }{(x-2)x(3x-4)}$

simplifica x-2 cu x-2 si mai simplifica 3x-4 cu 3x-4

$\frac{x-2}{x-2}$

1

a. 4$x^{2}$-12x+9-($x^{2}$+2x+1)=3$x^{2}$-4x-6x+8

4$x^{2}$-12x+9-$x^{2}$-2x-1=3$x^{2}$-10x+8

3$x^{2}$-10x+8=3$x^{2}$-10x+8

adevarat, x€R

la b am demonstrat ca e(x)=1