Step-by-step explanation:
First you will multiply 5 by 1 the answer is 5 now you will find factors of 5 that when we add or subtract them the answer is 4 so
x2 - 5x + x - 5
x ( x - 5) + 1( x - 5)
(x + 1) and ( x - 5) are the factors of x2 - 4x - 5
