Question

Log10X + Log10 (X-3)=1​

Answer 1

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x= 5 and x = -2

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Log10 X + Log10 (X-3)=1

Or, Log 10 x(x-3) = 1

Or, Log 10 x(x-3) = Log 10 10

Or, x(x-3)= 10

Or, x^2 -3x -10= 0

Or, x^2 - 5x+2x- 10 = 0

Or, x(x-5) + 2(x-5) = 0

Or, (x-5)(x+2)=0

Or, x= 5 and x = -2