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@ @QRQ@ @pý†bɾa@ @
.m + n = 1 − 2 = −1
x :( ) ( )
15 . 15
x +4
x
.
15 − 15 = 1
x x+4 2
15(x + 4) − 15x = 1 x(x + 4)
2
15x + 60 − 15x = x2 + 4x
2
x2 + 4x − 120 = 0
x = −4 ± 496 = −4 ± 4 31 = −2 ± 2 31
22
. x = −2 + 2 31
α +1 . α :( ) ( )
.
. α(α + 1) = q 2α + 1 = −p
α = −1 − p
2
. α + 1 = −1 − p + 1 = 1 − p
22
q = α(α + 1) = −1 − p 1 − p = p2 − 1
2 2 4
. p = 4q + 1 p2 = 4q + 1