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