1. 1)(х-6)(х+6)=х²-36
2)(3+х)(х-3)=(х+3)(х-3)=х²-9
3)(3b-5)(3b+5)=9b²-25
4)(5x+8y)(8y-5x)=(8y+5x)(8y-5x)=64y²-25x²
5)(m^5-n^3)(m^5+n^3)=m^25-n^9
6)(a+2)²=a²+4a+4
7)(6-x)²=36-12x+x²
8)(3x-4)²=9x²-24x+16
9)(5m+3n)²=25m²+30mn+9n²
10)(0,1a+10b)²=0,01a²+20ab+100b²
2. 1)x²-25=(x-5)(x+5)
2)36-16y²=(6-4y)(6+4y)
3)4x²-81y²=(2x-9y)(2x+9y)
4)0,09t²-121p²=(0,3t-11p)(0,3t+11p)
5)a²b²-16/9=(ab-4/3)(ab+4/3)
6)a²-14a+49=(a-7)²
7)25y²+10y+1=(5y+1)²
8)100a²-180ab+81b²=(10a-9b)²
9)16m²+49n²-112mn=16m²-112mn+49n²=(4m-9n)²