7. uzdevums

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( 1 + log2x)2 + 2 - log2x – 23 = 0
log2x = t
t2 + 2t + 1 + 2 – t -23 = 0
t2 + t – 20 = 0
t1 = 4;          t2 = -5
log2x = 4;   log2x = -5
x1 = 16;      x2 =