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[-6]------------[-2]------------------(4)---------------------(6)-
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[-6;4)∩[-2;6)=[-2;4)
(-2+4)/2=1
Окрестность 1
Радиус равен |4-(-2)|/2=6/2=3
по формуле разности квадратов:
х²у² - 4/9 = (ху - 2/3)(ху + 2/3)
<span>125a^6b^9=(5a^2b^3)^3
-0,027x^15y^12=(-0.3x^5y^4)^3</span>