6xy - 4x + 12 = 8
1)Phân tích đa thức thành nhân tử:
a) 11x2-6xy-5y2
b)4x3-16x2+19x-6
2) Tìm x,y biết
a)13x2+y2-16x-6xy+9=0
b)5x2+2y2-4x+6xy+8=0
Bài 1:
a: \(11x^2-6xy-5y^2\)
\(=11x^2-11xy+5xy-5y^2\)
\(=11x\left(x-y\right)+5y\left(x-y\right)\)
\(=\left(x-y\right)\left(11x+5y\right)\)
b: \(4x^3-16x^2+19x-6\)
\(=4x^3-8x^2-8x^2+16x+3x-6\)
\(=\left(x-2\right)\left(4x^2-8x+3\right)\)
\(=\left(x-2\right)\left(2x-1\right)\left(2x-3\right)\)
1)Phân tích đa thức thành nhân tử:
a) 11x2-6xy-5y2
b)4x3-16x2+19x-6
2) Tìm x,y biết
a)13x2+y2-16x-6xy+9=0
b)5x2+2y2-4x+6xy+8=0
Bài 1:
a: \(11x^2-6xy-5y^2\)
\(=11x^2-11xy+5xy-5y^2\)
\(=11x\left(x-y\right)+5y\left(x-y\right)\)
\(=\left(x-y\right)\left(11x+5y\right)\)
b: \(4x^3-16x^2+19x-6\)
\(=4x^3-8x^2-8x^2+16x+3x-6\)
\(=\left(x-2\right)\left(4x^2-8x+3\right)\)
\(=\left(x-2\right)\left(2x-3\right)\left(2x-1\right)\)
\(a,=11x^2-11xy+5xy-5y^2=\left(11x+5y\right)\left(x-y\right)\\ b,=4x^3-8x^2-8x^2+16x+3x-6\\ =\left(x-2\right)\left(4x^2-8x+3\right)\\ =\left(x-2\right)\left(4x^2-2x-6x+3\right)\\ =\left(x-2\right)\left(2x-1\right)\left(2x-3\right)\)
1)Phân tích đa thức thành nhân tử:
a) 11x2-6xy-5y2
b)4x3-16x2+19x-6
2) Tìm x,y biết
a)13x2+y2-16x-6xy+9=0
b)5x2+2y2-4x+6xy+8=0
Bài 1:
a: \(11x^2-6xy-5y^2\)
\(=11x^2-11xy+5xy-5y^2\)
\(=11x\left(x-y\right)+5y\left(x-y\right)\)
\(=\left(x-y\right)\left(11x+5y\right)\)
b: \(4x^3-16x^2+19x-6\)
\(=4x^3-8x^2-8x^2+16x+3x-6\)
\(=\left(x-2\right)\left(4x^2-8x+3\right)\)
\(=\left(x-2\right)\left(2x-1\right)\left(2x-3\right)\)
Phân tích thành nhân tử
\(x^2 -y^2 +5x-5y\)
\(x^2 -16y^2 +4x+4\)
\(3x^2 +6xy+3y^2 -12\)
\(4x^3 +4x^2 +x\)
\(x^2-y^2+5x-5y\)
\(=\left(x-y\right)\left(x+y\right)+5\left(x-y\right)\)
\(=\left(x-y\right)\left(x+y+5\right)\)
\(---\)
\(x^2-16y^2+4x+4\)
\(=\left(x^2+4x+4\right)-16y^2\)
\(=\left(x+2\right)^2-\left(4y\right)^2\)
\(=\left(x+2-4y\right)\left(x+2+4y\right)\)
\(=\left(x-4y+2\right)\left(x+4y+2\right)\)
\(---\)
\(3x^2+6xy+3y^2-12\)
\(=3\left(x^2+2xy+y^2-4\right)\)
\(=3\left[\left(x+y\right)^2-2^2\right]\)
\(=3\left(x+y-2\right)\left(x+y+2\right)\)
\(---\)
\(4x^3+4x^2+x\)
\(=x\left(4x^2+4x+1\right)\)
\(=x\left(2x+1\right)^2\)
Phân tích các đa thức sau thành nhân tử:
a) 6xy + 48x2y2 - 3y2 - 3x2
b) ( x2 + x )2 + 4x2 + 4x - 12
c) ( x2 + 4x + 8 )2 + 3x( x2 + 4x + 8) + 2x2
d) ( x2 + x + 1 )( x2 + x + 2 ) - 12
a) 4x . (a - b) - y . (b - a)
b)x^3 - 4x^2 + 8x - 8
c)5x^2 - 6xy + y^2
a) \(4x\left(a-b\right)-y\left(b-a\right)=4x\left(a-b\right)+y\left(a-b\right)=\left(4x+y\right)\left(a-b\right)\)
b) \(x^3-4x^2+8x-8=x^3-2x^2-2x^2+4x+4x-8\)
\(=x^2\left(x-2\right)-2x\left(x-2\right)+4\left(x-2\right)=\left(x-2\right)\left(x^2-2x+4\right)\)
c) \(5x^2-6xy+y^2=5x^2-5xy-xy+y^2\)
\(=5x\left(x-y\right)-y\left(x-y\right)=\left(5x-y\right)\left(x-y\right)\)
Tìm nghiệm nguyên của các phương trình:
a, 6xy+2x-3y=6
b, 4x^2+4x+y^2-12=0
M.n giúp mk nha
ChoA=4x^2Y^3+6xy-7và B=-8-3xy-3x^2y^3.Tính A+B;A-B;B-A
A+B = \(4x^2y^3+6xy-7+\left(-8-3xy-3x^2y^3\right)\)
A+B = \(4x^2y^3+6xy-7-8-3xy-3x^2y^3\text{=}x^2y^3-3xy-15\)
A-B = \(7x^2y^3+9xy+1\)
B-A = \(-7x^2y^3-9xy-1\)
4x^/x2+3/x-2+19/2-x
5xy^-3z/6xy+4x^y+3z/6xy