Bài 6:
1) 3x2(2x3 – x + 5) 2) (4xy + 3y – 5x)x2y
- 2 -
3) (3x2y – 6xy + 9x)(- 3
4 xy) 4) - 3
1 xz(- 9xy + 15yz) + 3x2 (2yz2 – yz)
5) (x3 + 5x2 – 2x + 1)(x – 7) 6) (2x2 – 3xy + y2)(x + y)
7) (x – 2)(x2 – 5x + 1) – x(x2 + 11) 8) [(x2 – 2xy + 2y2)(x + 2y) - (x2 + 4y2)(x – y)] 2xy
9) -3ab.(a2 - 3b) 10) (x2 – 2xy + y2 )(x - 2y)
11) (x + y + z)(x – y + z) 12) 12a2b(a - b)(a + b)
13) (2x2 - 3x + 5)(x2 - 8x + 2)
giúp mình nhanh nhé, mình sẽ vote 5 sao
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Sinh Học lớp 12
