Question

factorise : (p+q) square - 20(p+q)-125

Answer 1

=(p+q)²-20(p+q)-125
Let (p+q)=a
=a²-20a-125
=a²-25a+5a-125
=a(a-25) + 5(a-25)
(a-25)(a+5)
putting the value of a
(p+q-25)(p+q+5)


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Answer 2

(p+q-25)(p+q+5) is the answer.