Question

Сократите дроби , а ) и б)

Answer 1

А.
(х-2) (х+2)² \ (х-2) (х+2) = (х+2)
б.
20 (m² - n²) \ 15 (m²-2mn+n²) = 4 (m-n)(m+n) \ 3 (m-n)² = 4(m+n) \ 3 (m-n)

Answer 2

A) (x - 2)(x^2 + 4x + 4)/(x^2 - 4) =  (x - 2)(x^2 + 4x + 4)/(x - 2)(x + 2) = (x + 2)^2 / (x + 2) = x + 2
б) (20m^2 - 20n^2)/(15m^2 -30mn + 15n^2) = 20(m - n)(m + n)/15(m - n)^2 = 4(m + n)/3(m - n)