\(\left(x+y\right)^2+\left(x-y\right)^2=\left(x^2+2xy+y^2\right)+\left(x^2-2xy+y^2\right)=2\left(x^2+y^2\right)\)
(x+y)2+(x-y)2 = ( x2 +2xy+y2 ) + (x2 -2xy+y2 ) =\(2\left(x+y\right)^2\)
giup minh voi cac ban
giai pt sau bang cach dua ve dang tich:
(x-1)(x+2)(x-3)(x+6) = -32
Dung hang dang thuc dang nho de giai bai sau: 742+242-48.74
giup minh giai bai toan ve hang dang thuc nha
a <x+y+z+d>mu2
b,<x+y-z-d>mu2
bai 1 cmm hang dang thuc
a,(a+b+c)^2 +a^2+b^2+c^2=(a+b)^2+(b+c)^2+(c+a)^2
b, x^4+x^4+(x+y)^4=2(x^2+xy+y^2)^2
giAI HO MINH NHE NHANH LEN MINH DANG GAP
hay viet cac da thuc tren thanh tong binh phuong cua da thuc bac nhat,tu do tim ra gia tri x,y de cac da thuc tren bang 0
A=x2+y2+2x-4y+5
nho neu ca cach giai nhe moi nguoi
\(\left(3x+1\right)^2-4.\left(x-2\right)^2\)=
Giai dung nha, ai giai dung mk tick cho
Cung la bai phan tich da thuc thanh nhan tu dung hang dang thuc(cua lop 8)
so tu nhien n de hai don thuc dong dang 4x^9-2n * y^2 va 3y^2 * x^3n-11 dong dang
phan tich da thuc thanh nhan tu
x^2-x-y^2-y
x^2-2xy+y^2-z^2
bai 32 va 33 sbt
lop 8 bai phan tich da thuc thanh nhan tu bang cach nhom hang tu
CM cac hang dang thuc sau :
a) ( x + y )5 - x5 -y5 = 5.xy . ( x + y ) . ( x2 + xy + y2 )
b) ( x + y )5 - x7 - y7 = 7xy . ( x + y ) . ( x2 + xy + y2 )
Dang voi :))
