约分:(1)25x²分之5x (2)3a²b分之9ab²+6abc(3)3a+b分之9a²+6ab+b²(4)2(4)2x+12分之x²-36
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约分:(1)25x²分之5x (2)3a²b分之9ab²+6abc(3)3a+b分之9a²+6ab+b²(4)2(4)2x+12分之x²-36
约分:(1)25x²分之5x (2)3a²b分之9ab²+6abc(3)3a+b分之9a²+6ab+b²(4)2
(4)2x+12分之x²-36
约分:(1)25x²分之5x (2)3a²b分之9ab²+6abc(3)3a+b分之9a²+6ab+b²(4)2(4)2x+12分之x²-36
25x2分之5x=1/5x
3a2b分之9ab2+6abc=(3b+2c)/a
3a+b分之9a2+6ab+b2=(3a+b)^2/(3a+b)=3a+b