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Androbot2000
@Androbot2000
July 2022
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2lg x^2-lg^2(-x)-4=0
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mikael2
Verified answer
4lg|x|-lg²(-x)-4=0
-x>0 →x<0 |x|=-x
lg (-x)=t -t²+4t-4=0 t²-4t+4=(t-2)²=0 t=2
lg(-x)=2 -x=10²=100 x=-100
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Answers & Comments
Verified answer
4lg|x|-lg²(-x)-4=0-x>0 →x<0 |x|=-x
lg (-x)=t -t²+4t-4=0 t²-4t+4=(t-2)²=0 t=2
lg(-x)=2 -x=10²=100 x=-100