tìm x.y
x2y2 - 2xy2 + 8xy - 12x - 4x2y + 6x2 + 5y2 - 20y + 22 = 0
d/ 4x2y2 - 8xy2 + 4y2
e/ x3y + 10x2y + 35xy
f/2x3 –4x2y+2xy2–8x
g/3x2 –9xy–6x+18y
h/ x2y2 – 3xy2 + 2xy – 6y
d) \(4x^2y^2-8xy^2+4y^2=4y^2\left(x^2-2x+1\right)=4y^2\left(x-1\right)^2\)
e) \(x^3y+10x^2y+35xy=xy\left(x^2+10x+35\right)\)
f) \(2x^3-4x^2y+2xy^2-8x=2x\left(x^2-2xy+y^2-4\right)=2x\left[\left(x-y\right)^2-4\right]=2x\left(x-y-2\right)\left(x-y+2\right)\)
g) \(3x^2-9xy-6x+18y=3x\left(x-3y\right)-6\left(x-3y\right)=3\left(x-3y\right)\left(x-2\right)\)
h) \(x^2y^2-3xy^2+2xy-6y=xy\left(xy+2\right)-3y\left(xy+2\right)=\left(xy+2\right)\left(xy-3y\right)=y\left(xy+2\right)\left(x-3\right)\)
d: \(4x^2y^2-8xy^2+4y^2\)
\(=4y^2\left(x^2-2x+1\right)\)
\(=4y^2\left(x-1\right)^2\)
e: \(x^3y+10x^2y+35xy\)
\(=xy\left(x^2+10x+35\right)\)
f: \(2x^3-4x^2y+2xy^2-8x\)
\(=2x\left(x^2-2xy+y^2-4\right)\)
\(=2x\left(x-y-2\right)\left(x-y+2\right)\)
g: \(3x^2-9xy-6x+18y\)
\(=3x\left(x-3y\right)-6\left(x-3y\right)\)
\(=3\left(x-2\right)\left(x-3y\right)\)
h: \(x^2y^2-3xy^2+2xy-6y\)
\(=xy^2\left(x-3\right)+2y\left(x-3\right)\)
\(=y\left(xy+2\right)\left(x-3\right)\)
tìm đa thức A biết
2A+(2x2+y2)=6x2=5y2-2x2y2
2A-(xy + 3x2 -2y2 ) = x2 -8y+xy
A+(3x2y - 2xy2 ) = 2x2y = 4xy3
a: Sửa đề: \(2A+\left(2x^2+y^2\right)=6x^2+5y^2-2x^2y^2\)
=>\(2A=6x^2+5y^2-2x^2y^2-2x^2-y^2\)
=>\(2A=4x^2+4y^2-2x^2y^2\)
=>\(A=2x^2+2y^2-x^2y^2\)
b: \(2A-\left(xy+3x^2-2y^2\right)=x^2-8y+xy\)
=>\(2A=x^2-8y+xy+xy+3x^2-2y^2\)
=>\(2A=4x^2+2xy-8y-2y^2\)
=>\(A=2x^2+xy-4y-y^2\)
c: Sửa đề: \(A+\left(3x^2y-2xy^2\right)=2x^2y+4xy^3\)
=>\(A=2x^2y+4xy^3-3x^2y+2xy^2\)
=>\(A=-x^2y+4xy^3+2xy^2\)
Tìm x, y thỏa mãn x2y2-2xy2+8xy-12x+6x2+5y2-4x2y-20y-22=0
a/ 4x3 – xy2
b/ 5x3 – 10x2 + 5x
c/4x2 +24x+36-4y2
d/ 4x2y2 - 8xy2 + 4y2
e/ x3y + 10x2y + 35xy
f/2x3 –4x2y+2xy2–8x
g/3x2 –9xy–6x+18y
h/ x2y2 – 3xy2 + 2xy – 6y
a: \(4x^3-xy^2\)
\(=x\left(4x^2-y^2\right)\)
\(=x\left(2x-y\right)\left(2x+y\right)\)
b: \(5x^3-10x^2+5x\)
\(=5x\left(x^2-2x+1\right)\)
\(=5x\left(x-1\right)^2\)
c: \(4x^2+24x+36-4y^2\)
\(=4\left(x^2+6x+9-y^2\right)\)
\(=4\left(x+3-y\right)\left(x+3+y\right)\)
a) \(4x^3-xy^2=x\left(4x^2-y^2\right)=x\left(2x-y\right)\left(2x+y\right)\)
b) \(5x^3-10x^2+5x=5x\left(x^2-2x+1\right)=5x\left(x-1\right)^2\)
c) \(4x^2+24x+36-4y^2=\left(2x+6\right)^2-4y^2=\left(2x+6-2y\right)\left(2x+6+2y\right)\)
d) \(4x^2y^2-8xy^2+4y^2=4y^2\left(x^2-2x+1\right)=4y^2\left(x-1\right)^2\)
e) \(x^3y+10x^2y+35xy=xy\left(x^2+10x+35\right)\)
f) \(2x^3-4x^2y+2xy^2-8x=2x\left(x^2-2xy+y^2-4\right)=2x\left[\left(x-y\right)^2-4\right]=2x\left(x-y-2\right)\left(x-y+2\right)\)
g) \(3x^2-9xy-6x+18y=3x\left(x-2\right)-9y\left(x-2\right)=3\left(x-2\right)\left(x-3y\right)\)
h) \(x^2y^2-3xy^2+2xy-6y=xy\left(xy+2\right)-3y\left(xy+2\right)=\left(xy+2\right)\left(xy-3y\right)\)
g: \(3x^2-9xy-6x+18y\)
\(=3x\left(x-3y\right)-6\left(x-3y\right)\)
\(=3\left(x-2\right)\left(x-3y\right)\)
h: \(x^2y^2-3xy^2+2xy-6y\)
\(=xy^2\left(x-3\right)+2y\left(x-3\right)\)
\(=y\left(xy+2\right)\left(x-3\right)\)
Tìm các số x và y thỏa mãn : x^2y^2-2xy^2+8xy-12x-4x^2y+6x^2+5y^2-20y+22=0
Giải PT sau:
a) 9x2+29y2+30xy=6(x+5y−4)−29x2+29y2+30xy=6(x+5y−4)−2
b)5x2+5y2+8xy+2y−2x+2=05x2+5y2+8xy+2y−2x+2=0
c)y2−2y+3=6x2+2x+4y2−2y+3=6x2+2x+4
d)−9x2+18x−17x2−2x+3=y(y+4)
pặc pặc....pặc pặc...........pặc pặc......
._.
Cho hai đa thức P = x2y2 - 4x2y - xy2 + 2xy và Q = 4x2y2 + xy; Tính P + Q = ?
A) 5x2y2 - 4x2y - xy2 + 3xy
B) x2y2 + 3xy
C) 5x2y2 - 4x2y - xy2 + xy
D) x2y2 - 4x2y - xy2 + 3xy
\(P+Q=x^2y^2-4x^2y-xy^2+2xy+4x^2y^2+xy\)
\(P+Q=5x^2y^2-xy^2-4x^2y+3xy\)
giải hpt: √2x2+6xy+5y2+5=√2x2+6xy+5y2+14x+20y+52x2+6xy+5y2+5=2x2+6xy+5y2+14x+20y+5
và y^2-y+x^3=0
Tìm bậc của đa thức M= x2y2 + 2xy2