Question

помогите пожалуйста,срочно надо ​

Answer 1

$\frac{2y {}^{2} + 3y - 5}{y {}^{2} - 2y + 1 } = \frac{y {}^{2} + 5y - y - 5}{(y - 1) {}^{2} } = \frac{y(2y + 5) - (2y + 5)}{(y - 1) {}^{2} } = \frac{(2y + 5)(y - 1)}{(y - 1) {}^{2} } = \frac{2y + 5}{y - 1}$

$\frac{a {}^{2} + 5a + 4 }{a {}^{2} - a - 20} = \frac{a {}^{2} + 4a + a + 4 }{a {}^{2} + 4a - 5a - 20} = \frac{a(a + 4) + a + 4}{a(a + 4) - 5(a + 4)} = \frac{(a + 4)(a +1 )}{(a + 4)(a - 5)} = \frac{(a + 1)}{(a - 5)}$