a) -\(\frac{1}{2}\)x²y(2x³-\(\frac{2}{5}\) xy²-1)+\(\frac{1}{3}\) x⁶y² : \(\frac{1}{9}\) xy

b) Tim x bt: x(x-3)-x²+9=0

c) CM: (a+b)³-2b(3a²+b²)=(a-b)³

d) -16x⁴y⁶-24x⁵y⁵-9x⁶y⁴

vì sao nói sự kiện ngày 14/7 1789 là sự kiện mở đầu cho thắng lợi cách mạng pháp?

Cho x+y=1. Tính giá trị biểu thức: B=3.(x^2+y^2)-2.(x^3+y^3)

Complete the advertisement. Write a/an, the or a tick (✔) if no article is needed.

Is fun important for you? Do you enjoy _____excitement of____big cities? Or are you looking for___ relaxing break? Whatever you need, we have the perfect holiday for you. Spend____few days in North Wales - ______ scenery is amazing and there are lots of lakes and rivers for people who like ____ water sports. Or how about______weekend in New York? Spend the evening in the jazz club, and then climb______ Empire State Building for great view of _____ city at night.

Help me,please! I need it nowwww!

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Talk about your opinions about K-pop music?

HELP!!

vừa mới làm xong nè

dễ mà nhưng đề phải là A= 3^100-3⁹⁹+3⁹⁸-3⁹⁷+...+3² -3 +1 chứ

kết quả là (3¹⁰¹+1):2

cam on nhannhung mi la do cho liem buom