Question

Упростите выражение a: +(5-a)(a+5) b: (n-3)(n+11)-4(3n-2) help

Answer 1

a:

(5-a)(a+5) = (5-а)(5+а) = 25-а²

b:

(n-3)(n+11)-4(3n-2) = n²+11n-3n-33-12n+8 = n²-4n-25