Any one know how to do this question and what the answer is ?

The thing to expand is this

ln(4x^2−36x+72)

ln(4x^2−36x+72) = take out the GCF = 4

ln ( 4 [ x^2 - 9x + 18 ] ) = factor again

ln [ 4 ( x - 3) ( x - 6 ) ] =

Use the property that..... ln (a * b * c) = ln a + ln b + ln c

ln 4 + ln ( x - 3) + ln ( x - 6)