Question

factorisation. please finish before 3pm​

Answer 1

Step-by-step explanation:

1. (a-b)^2=a^2+b^2-2ab

(4a-1/8a)^2= (4a)^2+(1/8a)^2-2(4a)(1/8a)

= 16a^2+1/64a^2-1

2. a^2+5a-104

= a^2+13a-8a-104

= a(a+13)-8(a+13)

= (a+13)(a-8)