A) 3X2 - 3X B) 3X2 – 1 C)3X2 + 1 D) 3X2+ 3X

Question

1)   3x.(x – 1) = ? A)   3x2 - 3x       B)  3x2 – 1       C)3x2 + 1      D) 3x2+ 3x

Accepted Answer

đề 1 đề 2 điểm A 1-A; 2-C; 3-D; 4-C; 5-B; 6- C 1-B; 2-C; 3A; 4B; 5D; 6A 3 B:câu1 a)3x 2 – 3y 2 =3(x 2 - y 2 )= =3(x-y)(x+y) b) X 2 – xy + 7x – 7y =(x 2 -xy)+(7x-7y)= =(x-y)(x-7)...

A) 3X2 - 3X B) 3X2 – 1 C)3X2 + 1 D) 3X2+ 3X

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