(3а-b)²= 9a²-6ab+b²
(5z+t)²=25z²+10zt+t²
(5x-2y)²=25x²-20zy+4y²
(6m-4n)²=36m²-48mn+16n²
(x+c)²=x²+2xc+c²
(a-4)²=a²-8a+16
(3а-b)²= 9a²-6ab+b²
(5z+t)²=25z²+10zt+t²
(5x-2y)²=25x²-20zy+4y²
(6m-4n)²=36m²-48mn+16n²
(x+c)²=x²+2xc+c²
(a-4)²=a²-8a+16