Ответ:
Объяснение:
1) (c-x)^2=c^2-2cx+x^2
2) c^2-x^2=(c-x)(c+x)
3) (a+7)^2=a^2+14a+49
4) 16+8y+y^2=(4+y)^2
5) (x-5)(x+5)=x^2-25
6) (0.2-x)(0.04+0.2x+x^2)=0.008-x^3
7) 9x^2-6xy+y^2=(3x-y)^2
8) 1000-x^3=(10-x)(100+10x+x^2)
9) (5+b)(25-5b+b^2)=125+b^3
10) a^6+64=(a^2+4)(a^4-4a^2+16)
11) (x-1/5)^3=x^3-3/5x^2+3/25x-1/125