помогите плиззз (6а-5)(6а-1)=?

Question

помогите плиззз

(6а-5)(6а-1)=?

Answer 1

(6а-5)(6а-1)=36а квадрат-6а-30а+5=36а квадрат-36а+5

Answer 2

=36a^2-6a-30a+5=36a^2-36a+5

D=1296-4*36*5=1296-720=576=24^2

a1=36+24/72

a2=36-24/72

a1=60/72

a2=12/72