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Nguyễn Hải Phong
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2023-12-27 20:47:56
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2023-12-21 20:04:04
a
2023-12-21 18:20:49
máu gồm: huyết tương( giúp máu lưu thông dễ hơn)
tế bào máu
2023-12-20 19:11:20
D vật = 81 : 0,03 = 2700 (kg/m^3)
2023-12-19 20:33:53
a) (a - 2b)x(a + 2b)
b) x2-(y-3)2
=> (x-y+3)(x+y-3)
c) (2a + b - a)(2a + b + a)
=> (a+b)(3a+b)
d) (4(x - 1))2 - (5(x + y))2
⇔ (4x - 4 - 5x - 5y)(4x - 4 + 5x + 5y)
⇔ -(x + 5y + 4)(9x + 5y + -4)
e) (x + 5)2
f) (5x - 2y)2
h) (x - 5)(x2 + 5x + 25)
k) (x + 5)3
2023-12-18 19:55:03
<=>55 - 3x = 25
<=>-3x = 25 - 55
<=>-3x = -30
<=>x=10
2023-12-09 15:38:52
số bi của Hải là:
102-97=5