document.write( "Question 464677: Find all real solutions (the fours after the logs are the bases of the logarithms): log4[x]+log4[x-63]=3 \n" ); document.write( "

Algebra.Com's Answer #318335 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "log4[x]+log4[x-63]=3
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document.write( "log4[x(x-63)] = 3
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document.write( " 4^3 = x(x-63)
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document.write( "  x^2 -63x - 64 = 0
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document.write( "factoring:
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document.write( " (x-64)(x+1) = 0
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document.write( "  (x-64)= 0  x = 64
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document.write( "  (x+1) = 0  x = -1 Extraneous solution
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document.write( "  64 is the real solutions for x \n" );
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