Trả lời:
a, x2 + 2y2 - 2xy - 2x + 2
= x2 + y2 + y2 - 2xy - 2x + 1 + 1 + 2y - 2y
= ( x2 - 2xy + y2 - 2x + 2y + 1 ) + ( y2 - 2y + 1 )
= [ ( x - y )2 - 2 ( x - y ) + 1 ] + ( y - 1 )2
= ( x - y - 1 )2 - ( y - 1 )2
Trả lời:
a, x2 + 2y2 - 2xy - 2x + 2
= x2 + y2 + y2 - 2xy - 2x + 1 + 1 + 2y - 2y
= ( x2 - 2xy + y2 - 2x + 2y + 1 ) + ( y2 - 2y + 1 )
= [ ( x - y )2 - 2 ( x - y ) + 1 ] + ( y - 1 )2
= ( x - y - 1 )2 - ( y - 1 )2
Viet bieu thuc sau duoi dang binh phuong cua mot tong:
2xy2 +x2y4 +1
Phan tich da thuc sau thanh nhan tu:
a) x2 -3x +2
b) 3x2 - 7x -10
c) 2x2 -5x -7
HELP ME!!!
viet da thuc sau duoi dang binh phuong cua 1 tong hoac 1 hieu
\(\left(2x+3y\right)^2+2\left(2x+3y\right)+1\)
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
1. tong binh phuong tac ca cac nghiem cua phuong trinh :x4(x-1)+(x-1)x3=0
2.gia tri lon nhat cua bieu thuc7x-2x2
3.nghiem nho nhat cua da thuc 11x-2x2-15
2x2+y2-2xy+10x+25
viet bt thanh tong 2 binh phuog
(x^2+x)^2+3(x^2+x)+2
x^2+2xy+y^2+2x+2y-15
phan tich da thuc thanh nhan tu
Phân tích đa thức sau thành nhân tử
a) (a^2+b^2)^2-4a^2b^2
b) 3x^2-3xy-5x+5y
c) -x^3+3x^2 -3x+1
d) 2x^2+4xy+2y^2- 8z^2
e) a^3-a^2-a+1
f) x^3-2xy-x^2y+2y^2
phan tich da thuc thanh nhan tu
a) xy-y2+2x-2y
b) x2+2xy+y2-9
Phan tich da thuc thanh nhan tu
1) (2x+1)^2 - (x-1)^2
2) 9(x+3)^2 - 4(x-2)^2
3) 25(2x - y) ^2 - 16(x+2y)^2
4) x^4 + x^3 +x + 1
5) x^3 + 3x^2 + 3x + 1 -8y^3