A-Level Maths: F3-08 [Logarithms: Sketching y = log_4(x - 2) + 5]

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Hi I have a question in video at 1:09 why did you subtracted -5 first rather than directly going to 4^0=(x-2)+5
which gives x=-2 which cant be a real answer.

ParshvaPatel-iblm