Решите квадратные уравнения: 1) 2х²-5=0
2)-х²+3=0
3)-3(х+3)²+48=0
4)(х-4)=1/4
5)(х+1)²-4=0

1) 2х²-5=0,2х² = 5,х² = 2,5,х1 = √2,5,х2 = -√2,5,2)-х²+3=0,х² = 3,х1 = √3,х2 = -√3,3)-3(х+3)²+48=0,-3(х+3)² = -48,(х+3)² = 16,х+3 = 16,х = 16-3,х1 = 13,х+3 = -16,х = -16-3,х2 = -19,4)(х-4)²=1/4,х-4 = √1/4,х-4 = 1/2,х1 = 4 1/2,х-4 = -√1/4,х-4 = -1/2,х2 = 3 1/2,5)(х+1)²-4=0,(х+1)² = 4,х+1 = √4,х+1 = 2,х1 = 1,х+1 = -2,х2 = -3