2^2х-3*2^х-4=0
2^х=t
t^2-3*t-4=0
D=9+16=25
t1=(3+5)/2=8/2=4
t2=(3-5)/2=-2/2=-1 неудов.
2^х=4
2^х=2^2
Х=2
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2^2х-3*2^х-4=0
2^х=t
t^2-3*t-4=0
D=9+16=25
t1=(3+5)/2=8/2=4
t2=(3-5)/2=-2/2=-1 неудов.
2^х=4
2^х=2^2
Х=2