Question

aduceti la forma cea mai simpla a²-1/a+1×(a+1)²/(a-1)²

Answer 1

Mult succes în continuare !

Answer 2

$\frac{ {a}^{2} - 1 }{a + 1} \times \frac{ {(a + 1}) ^{2} }{ {(a - 1)}^{2} } = \frac{ {a}^{2} - {1}^{2} }{a + 1} \times \frac{ {(a + 1)}^{2} }{ {(a - 1)}^{2} } = \frac{(a - 1)(a + 1)}{a + 1} \times \frac{(a + 1) ^{2} }{ {(a - 1)}^{2} } = (a - 1) \frac{ {(a + 1)}^{2} }{ {(a - 1)}^{2} } = \frac{(a - 1)(a + 1) ^{2} }{ {(a - 1)}^{2} } = \frac{ {(a + 1)}^{2} }{ {(a - 1)}^{2 - 1} } = \frac{ {(a + 1)}^{2} }{a - 1}$