Respuesta :
If the question is
[tex]log_2(x)+log_2(x-6)=4[/tex]
which can be simplified to
[tex]log_2(x(x-6))=4[/tex]
By the definition of log, [tex]log_a(x)=y[/tex] means [tex]a^y=x[/tex]
=>
2^4=x(x-6)=x^2-6x
Simplify and solve for x
x^2-6x-16=0
(x+2)(x-8)=0
x=-2 or x=8
Since no answer choices are given, one of the equations in the above solution should appear in the answer choices.
The value of x from the given logarithmic expression are -2 and 8
Indices and law of Indices
Given the expression
log2x + log2(x – 6) = 4
Applying the product rule in indices
log2(x(x-6)) = 4
log2(x²-6x) = log2 16
Cancelling log on both sides, we will have;
x² - 6x = 16
Equate to zero
x² - 6x - 16 = 0
x² -8x +2 x - 16 = 0
x(x-8) + 2(x-8) = 0
x = -2 and 8
Hence the value of x from the given logarithmic expression are -2 and 8
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