Phân tích đa thức sau thành nhân tử:
x(y2+z2)+y(z2+x2)+z(x2+y2)+2xyz
Phân tích đa thức thành nhân tử :
4(x2y2 + z2t2 + 2xyzt) - (x2 + y2 - z2 - t2)2
Nhớ là phân tích triệt để cho mik nha !!!!!
\(4\left(x^2y^2+z^2t^2+2xyzt\right)-\left(x^2+y^2-z^2-t^2\right)^2\)
\(=\left(2xy-2tz\right)^2-\left(x^2+y^2-z^2-t^2\right)\)
\(=\left(2xy-2tz-x^2-y^2+z^2+t^2\right)\left(2xy-2tz+x^2+y^2-z^2-t^2\right)\)
\(=\left[-\left(x-y\right)^2+\left(z-t\right)^2\right]\left[\left(x+y\right)^2-\left(t+z\right)^2\right]\)
\(=-\left(x-y-z+t\right)\left(x-y+z-t\right)\left(x+y-t-z\right)\left(x+y+t+z\right)\)
4(x2y2+z2t2+2xyzt)−(x2+y2−z2−t2)24(x2y2+z2t2+2xyzt)−(x2+y2−z2−t2)2
=[2(xy+zt)]2−(x2+y2−z2−t2)2=[2(xy+zt)]2−(x2+y2−z2−t2)2
=(2xy+2zt)2−(x2+y2−z2−t2)2=(2xy+2zt)2−(x2+y2−z2−t2)2
=(2xy+2zt−x2−y2+z2+t2)(2xy+2zt+x2+y2−z2−t2)2
Phân tích đa thức thành nhân tử : 16x2z2 + y2 - z2 - 16x2y2
`16x^2z^2+y^2-z^2-16x^2y^2`
`=16x^2(z^2-y^2)+(y^2-z^2)`
`=16x^2(z-y)(y+z)+(y-z)(y+z)`
`=(y+z)[16x^2(z-y)+y-z]`
`=(y+z)(16x^2z-16x^2y+y-z)`
\(16x^2z^2+y^2-z^2-16x^2y^2\\ =16x^2\left(z^2-y^2\right)-\left(z^2-y^2\right)\\ =\left(z^2-y^2\right)\left(16x^2-1\right)\\ =\left(z-y\right)\left(z+y\right)\left(4x+1\right)\left(4x-1\right)\)
Phân tích đa thức thành nhân tử :
a) a5 – ax4 + a4x – x5
b) 16x2z2 + y2 – z2 – 16x2y2
a: Ta có: \(a^5-ax^4+a^4x-x^5\)
\(=a\left(a^4-x^4\right)+x\left(a^4-x^4\right)\)
\(=\left(a-x\right)\left(a+x\right)\left(a^2+x^2\right)\cdot\left(a+x\right)\)
\(=\left(a-x\right)\cdot\left(a+x\right)^2\cdot\left(a^2+x^2\right)\)
Phân tích đa thức thành nhân tử : x2 – 2xy + y2 + 3x – 3y – 10
x2-2xy+y2+3x-3y-10
= (x-y)2+3(x-y)-10
= [(x-y)2+5(x-y)]-[2(x-y)+10]
= (x-y)(x-y+5)-2(x-y+5)
= (x-y+5)(x-y-2)
Ta có: \(x^2-2xy+y^2+3x-3y-10\)
\(=\left(x-y\right)^2+3\left(x-y\right)-10\)
\(=\left(x-y+5\right)\left(x-y-2\right)\)
Phân tích các đa thức sau thành nhân tử: x 2 y + x y 2 + x 2 z + x z 2 + y 2 z + y z 2 + 3xyz.
x 2 y + x y 2 + x 2 z + x z 2 + y 2 z + y z 2 + 3xyz.
= ( x 2 y + x 2 z + xyz) + (x y 2 + y 2 z + xyz) + (x z 2 + y z 2 + xyz)
= x(xy + xz + yz) + y(xy + yz + xz) + z(xz + yz + xy)
= (x + y + z)(xy + xz + yz).
\(x^2y+xy^2+x^2z+xz^2+y^2z+yz^2+3xyz\)
\(=\left(x^2y+x^2z+xyz\right)+\left(xz^2+yz^2+xyz\right)+\left(xy^2+y^2z+xyz\right)\)
\(=x\left(xy+xz+yz\right)+z\left(xz+yz+xy\right)+y\left(xy+yz+xz\right)\)
\(=\left(x+y+z\right)\left(xy+yz+xz\right)\)
c) C = x(y2 +z2)+y(z2 +x2)+z(x2 +y2)+2xyz.
d) D = x3(y−z)+y3(z−x)+z3(x−y).
e) E = (x+y)(x2 −y2)+(y+z)(y2 −z2)+(z+x)(z2 −x2).
b) x2 +2x−24 = 0.
d) 3x(x+4)−x2 −4x = 0.
f) (x−1)(x−3)(x+5)(x+7)−297 = 0.
(2x−1)2 −(x+3)2 = 0.
c) x3 −x2 +x+3 = 0.
e) (x2 +x+1)(x2 +x)−2 = 0.
a) A = x2(y−2z)+y2(z−x)+2z2(x−y)+xyz.
b) B = x(y3 +z3)+y(z3 +x3)+z(x3 +y3)+xyz(x+y+z). c) C = x(y2 −z2)−y(z2 −x2)+z(x2 −y2).
Đề bài yêu cầu gì vậy em.
phân tích đa thức sau thành nhân tử
e,x(y2-z2)+y(z2-x2)+(z2-y2)....help
Phân tích đa thức sau thành nhân tử x 2 ( y - z ) + y 2 ( z - x ) + z 2 ( x - y )
Phân tích đa thức sau thành nhân tử : x2(x + 4)2 – (x + 4)2 – (x2 – 1)
\(x^2\left(x+4\right)^2-\left(x+4\right)^2-\left(x^2-1\right)\\ =\left(x+4\right)^2\left(x^2-1\right)-\left(x^2-1\right)\\ =\left(x^2-1\right)\left[\left(x+4\right)^2-1\right]\\ =\left(x-1\right)\left(x+1\right)\left(x+4-1\right)\left(x+4+1\right)\\ =\left(x-1\right)\left(x+1\right)\left(x+3\right)\left(x+5\right)\)
\(= (x+4)^2(x^2-1)-(x^2-1)=[(x+4)^2-1](x^2-1)\)
\(=(x+4-1)(x+4+1)(x-1)(x+1)\)
\(=(x+3)(x+5)(x-1)(x+1)\)
\(x^2\left(x+4\right)^2-\left(x+4\right)^2-\left(x^2-1\right)\)
\(=\left(x+4\right)^2\left(x^2-1\right)-\left(x^2-1\right)\)
\(=\left(x^2-1\right)\left[\left(x+4\right)^2-1\right]\)
\(=\left(x^2-1\right)\left(x+3\right)\left(x+5\right)\)
Phân tích đa thức thành nhân tử:
A= x.(y2 - z2) + y.(z2 - x2) + z.(x2 - y2).
B= a.(b3 - c3) + b.(c3 - a3) + c.(a3 - b3).
C= ab.(a + b) - bc.(b + c) + ac. (a - c).
\(A=x\left(y^2-z^2\right)+y\left(z^2-x^2\right)+z\left(x^2-y^2\right)=x\left(y^2-z^2\right)+y\left(-y^2+z^2-x^2+y^2\right)+z\left(x^2-y^2\right)=\left(y^2-z^2\right)\left(x-y\right)+\left(x^2-y^2\right)\left(z-y\right)=\left(y-z\right)\left(y+z\right)\left(x-y\right)-\left(x-y\right)\left(x+y\right)\left(y-z\right)=\left(x-y\right)\left(y-z\right)\left(y+z-x-y\right)=\left(x-y\right)\left(y-z\right)\left(z-x\right)\)
\(B=a\left(b^3-c^3\right)+b\left(c^3-a^3\right)+c\left(a^3-b^3\right)=ab^3-ac^3+bc^3-a^3b+a^3c-b^3c=ab\left(b^2-a^2\right)-c^3\left(a-b\right)+c\left(a^3-b^3\right)=-ab\left(a-b\right)\left(a+b\right)-c^3\left(a-b\right)+c\left(a-b\right)\left(a^2+ab+b^2\right)=\left(a-b\right)\left(-a^2b-ab^2-c^3+a^2c+abc+b^2c\right)\)
\(C=ab\left(a+b\right)-bc\left(b+c\right)+ac\left(a-c\right)=ab\left(a+b\right)-bc\left(a+b-a+c\right)+ac\left(a-c\right)=ab\left(a+b\right)-bc\left(a+b\right)+bc\left(a-c\right)+ac\left(a-c\right)=b\left(a+b\right)\left(a-c\right)+c\left(a-c\right)\left(a+b\right)=\left(a+b\right)\left(c+c\right)\left(a-c\right)\)