Log2(x-3)(x+5)+log2(x-3\x+5)=2

Question

Log2(x-3)(x+5)+log2(x-3\x+5)=2

Answer 1

Использованы свойства логарифмов

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Answer 2

Log2 (x-3)(x+5)(x-3)/(x+5)=log2 4
x^2-6x+9=4
x^2-6x+5=0
D=36-20=16
x1=(6-4)/2=1
x2=(6+4)/2=5