Question

Factorise: a^2- 10a -75​

Answer 1

Answer:

a2-10a-75

a2-15a+5a-75

a(a-15)+5(a-15)

(a+5)(a-15)

these are two factors of this equation

Answer 2

Answer:

(a+5) (a-15)

Step-by-step explanation:

a²-10a-75

=a²+5a-15a-75

=a(a+5)-15(a+5)

=(a+5) (a-15)