Question

Сократите дроби$frac{9m^2 - k^2}{21m^2 - 7mk} и frac{12x^6y^4t}{15x^2yt^3}$:

Answer 1

(3m-k)(3m+k)/[7(3m-k)]=(3m+k)/7
$12x^6y^4t/15x^2yt^3=4x^4y^3/t^2$