A) 4Y2 – 4Y B) 2Y2 – 4Y C)2Y2 + 4Y D) 2Y2 - 4

Question

1)   2y.(y – 2) = ?A)   4y2 – 4y       B)  2y2 – 4y       C)2y2 + 4y      D) 2y2 - 4

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) 4Y2 – 4Y B) 2Y2 – 4Y C)2Y2 + 4Y D) 2Y2 - 4

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