Question

Сократите дробь
1) a^8-a/a^8-a^15
2) 9x^2-8x-1/x^2-1

Answer 1

1. a(a'7-1) / a'7(1-a'7) = -1/a'6
2. (x-1)(x+1) / x'2+1 = 1