Đáp án:
Giải thích các bước giải:
`N=(x-2y)^2-(x+y)(x^2-xy+y^2)+(x+2y)^2`
`N=x^2-4xy+4y^2-x^3-y^3+x^2+4xy+4y^2`
`N=2x^2+8y^2-x^3-y^3`
`text{thay}` `x=-1;y=1/2`
`=>N=2+8×1/4+1-1/8`
` N=39/8`
`text{xin 5 sao và hay nhất nha}`
Ai giúp em bài này với em ko biết
ùng một từ láy thay cho từ gạch chân dưới đây để câu văn sau thêm sinh động. Chép lại các câu văn sau khi đã thêm từ. a. Gió thổi mạnh, lá cây rơi nhiều, từng đàn cò bay nhanh. ................................................................................................................................................. b.Mưa kéo dài suốt ngày đêm, mưa làm tối mặt mũi. ........................................................................................................................
giúp mình với mình đg cần gấp nhanh và đúng vote 5s và ctrl hn ạ
bài 1 phần e , f , h heplll99999999999999999999999 làm theo cách lớp 7
Tiếng Từ ghép Từ láy a. Chứa tiếng sáng ......................................................... ........................................................ ......................................................... ........................................................ b. Chứa tiếng mờ ......................................................... ........................................................ ......................................................... ........................................................ c. Chứa tiếng trắng ......................................................... ........................................................ ......................................................... ...................................................
GTNN hoặc LN của căn {5+4x-x^2}
cali: Ngocha285 bằng app nhanh nha
Help nhanh với nhớ làm đầy đủ và đúng nha ai nhanh,đúng và đầy đủ mik cho ctlhn+vote 5sao
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