a) M+(5x²-2xy)=6x²+9xy-y² b) M-(3xy-4y²)=x²-7xy+8y² c) (25x²y-13xy²+y3) -M=11x²y-2y³ d) M+(12x⁴-15x²y+2xy²+7) =0 Ai giúp e vs ạ e cần gấp trc 9h15 :((

Các câu hỏi liên quan

Các bạn giúp mình với nhaa ~ FAKE FASHIONS (1) ……………………………………………. (it / say / that) most designer goods sold in street markets these days are fakes. It isn’t surprising; most designers only sell their goods through upmarket shops. There is even more of a problem on the Internet. In June 2008 a French court found eBay guilty of allowing fake goods to be sold on their website. The court (2) ……………………………………………. (have / eBay / pay) €40 million to the luxury brands Louis Vuitton and Christian Dior in compensation. Of course, the people who buy these items often don’t know that they are fakes. A man who paid £500 for a ‘Rolex watch’ only discovered it was a fake when he (3) …………………………………………. (have / it / repair) by a local jeweller. People often find that clothes are fakes when they (4) ……………………………………………. (need / wash). They wash them and discover that they shrink or the colour changes - something that would never happen with a real designer product. (5) ……………………………………………. (It / often / argue) that designer brands are much too expensive. People don’t like paying such high prices and don’t seem to care that designers are losing money. But the truth is that buying fake goods does have serious consequences because the people who deal in these fakes are often serious criminals. They (6) ……………………………………………. (have / the goods / make) in small factories in the Far East or South America and then import them to Europe and the USA. Some of the people making the goods (7) ……………………………………………. (think / be) children who work in terrible conditions for almost no money. They are the ones who pay the real price for our fake designer clothes.