Answer :
In the given expression
Check weather there is any common factors for all terms;
None;
Regrouping the 1st 2 terms we have,
x2 - ax= x[x - a] -------eq 1
Regrouping the last 2 terms we have,
-bx + ab = -b[x – a] -------eq 2
Combining eq 1 and 2
x2 – ax – bx + ab = x[x - a] - b[x – a]
= [x - b][x - a]
Hence the factors of[ x2 – ax – bx + ab] are [x - b]and [x - a]
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