(3x+1)(x+2) 化简
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(3x+1)(x+2) 化简
(3x+1)(x+2) 化简
(3x+1)(x+2) 化简
(3x+1)(x+2)
=3x(x+2)+(x+2)
=3x²+6x+x+2
=3x²+7x+2
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解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1
请问这道题咋做 :(x)X (x+1) X (x+2) X (x+3) =360
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