Question

Regaló puntos Ù-Ú

ayudsaaaaasa​

Answer 1

Explicación paso a paso:

1.

$(7x + y)(2x + 5y) = 14 {x}^{2} + 35xy + 2xy + 5 {y}^{2} = 14 {x}^{2} + 37xy + 5 {y}^{2}$

2.

$2 {x}^{3} - 3x - 1 \div {x}^{2} - 1 = 2x + \frac{( - x - 1)}{ {x}^{2} - 1}$