Răspuns :
[tex]a) \frac{2.3xy}{5} = \frac{2.3xy \times 3x}{5 \times 3x} = \frac{6.9 {x}^{2} y}{15x} [/tex]
[tex]b) \frac{2x}{x + 2} = \frac{2x(x - 2)}{(x + 2)(x - 2)} = \frac{2 {x}^{2} - 4x}{ {x}^{2} - {2}^{2} } = \frac{2 {x}^{2} - 4x}{ {x}^{2} - 4} [/tex]
[tex]b) \frac{2x}{x + 2} = \frac{2x(x - 2)}{(x + 2)(x - 2)} = \frac{2 {x}^{2} - 4x}{ {x}^{2} - {2}^{2} } = \frac{2 {x}^{2} - 4x}{ {x}^{2} - 4} [/tex]
a) ³ˣ⁾2,3xy 2,3xy×3x 6,9x²y
--------- = -------------- = ----------
5 5×3x 15 x
ˣ⁻²⁾2x 2x(x-2) 2x²- 4x
b) ---------- = -------------- = -----------
x + 2 ( x+2)( x-2) x² - 4
--------- = -------------- = ----------
5 5×3x 15 x
ˣ⁻²⁾2x 2x(x-2) 2x²- 4x
b) ---------- = -------------- = -----------
x + 2 ( x+2)( x-2) x² - 4