Bài 1:("."là nhân nha)
a)(a^2-2.a+2).(a^2+2.a+2)
b)(9.y^2-6.x^2.y+2.x^4).(9.y^2+6.x^2.y+2.x^4)
c)(x^4-4.x^3+8.x^2+4.x+1).(x^4+4.x^3+8.x^2-4.x+1)
d)-(5.x-6).(25.x^2+30.x+36)
e)-(2.y-x).(2.y+x).(4.y^2-2.x.y+x^2).(4.y^2+2.x.y+x^2)
f)(a^2-a+2).(a^2+a+2)
Bài 2:
a)(x^2+x+1).(x^3-x+1)
b)(x^2+x+1).(x^6-x^4+x^3-x+1)
c)(x^2-x+1).(x^2+x+1).(x^4-x^2+1)
Bài 3:
a)(x^2+x+1).(x^6-x^5+x^3-x^2+1)
b)(x^2-x+1).(x^3+x^2-1)
c)(x^2-x+1).(x^2+x+1)
d)(x^2+x+1).(x^5-x^4+x^3-x+1)
Bài 4:
a)(2.x^2-6.x+9).(2.x^2+6.x+9)
b)(y^2-4.x.y+8.x^2).(y^2+4.x.y+8.x^2)
c)(y^2-2.x.y+2.x^2).(y^2+2.x.y+2.x^2)
d)(2.x^4-2.x^2+1).(2.x^4+2.x^2+1)
e)(x^2.y^2-2.x.y+2).(x^2.y^2+2.x.y+2)
f)(x^2+x+1).(x^5-x^4+x^2-x+1)
g)(x^2-6.x+18).(x^2+6.x+18)
h)(x^2-4.x+8).(x^2+4.x+8)
i)(2.y^2-6.x.y+9.x^2).(2.y^2+6.x.y+9.x^2)
k)(2.y^2-2.x.y+x^2).(2.y^2+2.x.y+x^2)
l)(x^2.y^2-2.x.y+2).(x^2.y^2+2.x.y+2)
m)(2.x^2.y^2-2.x.y+1).(2.x^2.y^2+2.x.y+1)
n)4.b^2+a^4
p)(x^2-2.x+2).(x^2+2.x+2)
q)(2.x^4-2.x^2+1).(2.x^4+2.x^2+1)
Bài 5:
a)(x^2-x+1).(x^2+x+1).(x^4-x^2+1).(x^8-x^4+1).(x^16-x^8+1).(x^32-x^16+1)
b)(a^2+a+1).(a^8-a^7+a^5-a^4+a^3-a+1)
c)(a^2-a+1).(a^3-a-1)
vote nha
