x2-xy-2y2
= x2-2xy+xy-2y2
=x(x-2y)+y(x-2y)
=(x-2y)(x+y)
x2-xy-2y2
= x2-2xy+xy-2y2
=x(x-2y)+y(x-2y)
=(x-2y)(x+y)
Phan tich da thuc sau thanh nhan tu : (x+1)(x+2)(x+3)(x+4)-8
phan tich da thuc thanh nhan tu
3(x4+x2+1)-(x2+x+1)2
Phân tich da thuc thanh nhan tu :
X^2-2xy+y^2+2x-2y
Bài 2 : rút gon
X^3+2x2y+xy^2 phần ( k viết dau gach ngang dc)x^2-y^2
phan tich da thuc thanh nhan tu
\(\left(x^2-y^2+1\right)^3-x^6-y^6-1\)
phan tich da thuc thanh nhan tu
a)x4+x2+x+1
b)11x4+4x2-5
phan tich cac da thuc sau thanh nhan tu :
a,x\(^2\)y\(^3\)-\(\dfrac{1}{2}\)x\(^4\)y\(^8\)
Phan tich da thuc sau thanh nhan tu:
a) \(a\left(b+c\right)^2+b\left(c+a\right)^2+c\left(a+b\right)^2\)
b)\(a^4+b^4+c^4-2a^2b^2-2a^2c^2-2c^2b^2\)
phan tich thanh nhan tu \(x\sqrt{x}-3x+4\sqrt{x}-2\) voi x>0
phan tich cac da thuc sau thanh nhan tu :
a,2x+ 2y
b,5x+20y
c,6xy-30y
d,5x(x-110-10y(x-11)
e,x\(^3\)-4x\(^2\)+x
f,x(x+y)-(2x+2y)
h,5x(x-2y)+2(2y-x)
i,x\(^2\)y\(^3\)-\(\dfrac{1}{2}\)x\(^4\)y\(^8\)
j, a\(^2\)b\(^4\)+a\(^3\)b-abc
k, -x\(^2\)y\(^2\)z-6x\(^3\)y-8x\(^4\)z\(^2\)-9x\(^5\)y\(^5\)z\(^5\)
l, 7x(y-4)\(^2\)-(4-7)\(^3\)