Найдите целые решения уравнений:
1)х^4 - 16,25х^2 + 4 = 0
2)х^4 - 1,36х^2 + 0.36 = 0
3)х^4 -25,16х^2 +4 = 0
4)х^4 - 4,36х^2 + 1,44 =0

1) D = 264,0625 - 16 = 248,0625 = (15,75)²x² = (16,25 + 15,57)/2 = 32/2 = 16x1 = -4x2 = 42) D = 1,8496 - 1,44 = 0,4096 = (0,64)²x² = (1,36 + 0,64)/2 = 1x1 = -1x2 = 13) D = 633,0256 - 16 = 617,0256 = (24,84)²x² = (25,16 + 24,84)/2 = 50/2 = 25x1 = -5x2 = 54) D = 19,0096 - 5,76 = 13,2496 = (3,64)²x² = (4,36 + 3,64)/2 = 8/2 = 4x1 = -2x2 = 2