分解因式①5a^2b÷(-1/3ab)*(2ab^2)^2 ②(3a^2b-4ab^2-5ab-1)(-2ab^2) ③(3x-2y)(y-3x)要过程!
分解因式①5a^2b÷(-1/3ab)*(2ab^2)^2 ②(3a^2b-4ab^2-5ab-1)(-2ab^2) ③(3x-2y)(y-3x)要过程!
数学人气:226 ℃时间:2019-10-11 17:02:42
优质解答
①5a^2b÷(-1/3ab)*(2ab^2)^2 =-15a×4a^2b^4=-60a^3b^4②(3a^2b-4ab^2-5ab-1)(-2ab^2)=-6a^3b^3+8a^2b^4+10a^2b^3+2ab^2③(3x-2y)(y-3x)=3xy-9x^2-2y^2+6xy=-9x^2-2y^2+9xy
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