计算(3y-1)(2y+3)-(6y-5)(y-4)
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计算(3y-1)(2y+3)-(6y-5)(y-4)
计算(3y-1)(2y+3)-(6y-5)(y-4)
计算(3y-1)(2y+3)-(6y-5)(y-4)
(3y-1)(2y+3)-(6y-5)(y-4)
=(6y²+7y-3)-(6y²-29y+20)
=36y-23
(3y-1)(2y+3)-(6y-5)(y-4)
=6y²+7y-3-6y²+29y-20
=36y-23
36y-23
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