a math question先化简,再求值:(3X+1)(2X-3)-(6X-5)(X-4),其中X=2.
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a math question先化简,再求值:(3X+1)(2X-3)-(6X-5)(X-4),其中X=2.
a math question
先化简,再求值:(3X+1)(2X-3)-(6X-5)(X-4),其中X=2.
a math question先化简,再求值:(3X+1)(2X-3)-(6X-5)(X-4),其中X=2.
(3X+1)(2X-3)-(6X-5)(X-4),
=(6x^2-7x-3)-(6x^2-29x+20)
=22x-23
=22*2-23
=44-23
=21
原式=22X-23=21
化简为 22x-23 结果为21
math question
a math question先化简,再求值:(3X+1)(2X-3)-(6X-5)(X-4),其中X=2.
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