1 задание:
а)(-z-3)^2=z^2+6z+9
б)(-n+8)^2=64-16n+n^2
в)(-m-10)^2=m^2+20m+100
г)(2a+1)^2=4a^2+4a+1
д)(3c-2)^2=9c^2-12c+4
е)(6x-3)^2=36x^2-36x+9
ё)(7y+6)^2=49y^2+84y+36
ж)(8x+3y)^2=64x^2+48xy+9y^2
з)(6m-4n)^2=36m^2-48mn+16n^2
и)(9p-2q)^2=81p^2-36pq+4q^2
к)(10z+3t)^2=100z^2+60zt+9t^2
3 задание
а)(3x-5y)(3x+5y)=9x^2-25y^2
б)(7а-8b)(7a+8b)=49a^2-64b^2
в)(5х-2y^2)(5x+2y^2)=25x^2-4y^4