Question

сократить дробь (25-х²)/(3х²-11х-20)

Answer 1

$frac{25 - {x}^{2} }{3 {x}^{2} - 15x + 4x - 20} = \ frac{(5 - x)(5 + x)}{(x - 5)(3x + 4)} = \ - frac{5 + x}{3x + 4}$