Question

Factorise (a*a-5)(a+5)-25​

Answer 1

Answer:

a^3+5a^2-5a-50

Step-by-step explanation:

(aa-5)(a+5)-25

aa=a^2

(a^2-5)(a+5)-25

=a^2a+5a^2-5a-5*5

=a^3+5a^2-5a-25-25

=a^3+5a^2-5a-50