Question

Сократить дробь
1.) 11a^2b^5c^3
_____________
-121ab^3c^2

2) -4x^3y^4z^5
_____________
-12x^2y^3z^5

3) m^2-n^2
______________
m+n

4) y^2-4y+4
____________
y-2

Answer 1

3) m²-n² / m+n = (m-n)(m+n) / m+n = m-n