Vũ Anh Khôi
Giới thiệu về bản thân
ai donet cho tôi 10 xu được ko
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2025-11-07 20:44:08
2025-11-07 20:44:08
2025-11-07 20:44:08
2025-11-07 20:44:08
2025-11-07 20:44:08
2025-11-07 20:44:08
2025-11-07 20:44:08
2025-10-22 17:04:15
a) 2(3x - 1) = 10
3x - 1 = 10 : 2
3x - 1 = 5
3x = 5 + 1
3x = 6
x = 6 : 3
x = 2
b) (3x + 4)² - (3x - 1)(3x + 1) = 49
9x² + 24x + 16 - 9x² + 1 = 49
24x + 17 = 49
24x = 49 - 17
24x = 32
x = 32 : 24
x = 4/3
2025-10-22 17:02:37
a) A=(5x2y3−3x2y+xy) : \(x y\).
=5xy2-3x+1
b) A+2(x3−x2y+2xy+3)=3x3−2x2y−xy+3
A+2x2-2x2y+4xy+6=3x3−2x2y−xy+3
A=2x2-2x2y+4xy+6-(3x3-2x2y-xy+3)
A=2x2-2x2y+4xy+6-3x3+2x2y-xy+3
A=2x2+4xy+3-3x3