1)(x²+14x)+45=0
x(x+14)+45=0
(x+45)(x+14)=0
2)x²+7,3x+2,1=0
(x²+7,3x)+2,1=0
x(x+7.3)+2.1=0
(x+2.1)(x+2.1)=0
3)x²+9х-22=0
(x²+9х)-22=0
x(x-9x)-22=0
(x-22)(x-9x)
4)x²-1/6х-1/6=0
(x²-1/6х)-1/6=0
x(x-1/6)-1/6=0
(x-1/6)(x-1/6)=0
(x-1/6)²=0