№1
A)16а^2bc^3-12ac^3+9abc^5
Б)12x^2yz+18xy^3z^2-27x^5z^2-24xy^4z^4
В)0,25m^2n^2k-0,45m^3nk^2-1,5mn^3k^2-0,05m^5n^3k
Г)1,42x^2y^4z^3-2 1/2xy^3z^2-0,2x^3y^2z+3 1/3xy^3z^2
Д)1/3a^2bx^3- 1 1/2ab^2x^2+0,3a^2x^3-1,1a^5b^3x^4
№2
а)9a^2-4
б)25x^2-1
в)1/4m^2-16n^2
г)100a2-0,25d^2
д)x^12-y^2
е)m^6-n^6
ж)2 1/4 - c^4
з)1 9/16a^10-0,01b^2
и)x^4-y^4

1

Ответы и объяснения

2013-12-02T14:09:14+00:00
1)
а)=ac^3(16ab-12+9bc^5)
б)=3xz(4xy+6y^3z-9x^4z-8y^4z^3)
в)=0.05mnk(5mn-9m^2k-30n^2k-m^4n^2)
г)=xy^2z(1.42xy^2z^2-2 1/2yz-0.2x^2+3 1/3 yz)
д)=ax^2(1/3abx-1 1/2 b^2+0.3ax-1.1a^4b^3x^2)


2)а)=(3a-2)(3a+2)
б)=(5x-1)(5x+1)
в) =(1/2m-4n)(1/2m+4n)
г)=(10a-0.5d)(10a+0.5d)
д)=(x^6-y)(x^6+y)
е)=(m^3-n^3)(m^3+n^3)
ж)=(3/2-c^2)(3/2+c^2)
з)=(5/4a^5-0.1b)(5/4a^5+0.1b)
и)=(x^2-y^2)(x^2+y^2) или (x-y)(x+y)(x^2+y^2)