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x = 2 ± 4 − 4 × 2 × (−3) = 2 ± 28
44
= 2±2 7 = 1±1 7
4 22
. ∆ = 16 − 4m :( ) ()
.∆ = 0
.m = 4 .16 − 4m = 0
α(2α) = a − 2 α + 2α = 6 :( ) ()
aa
( ) α=2
a
( ) 2α2 = a − 2
a
α
2 4 = a − 2
a2 a
8 =a −2
a
a2 − 2a = 8
a2 − 2a − 8 = 0
(a − 4)(a + 2) = 0
a +2 = 0 a−4 = 0
.a = −2 a = 4 ()
x :( )
.