Question

Срочно. Пожалуйста сократите дробь!

Answer 1

1. $frac{b(b + 9)}{(b-9)(b+9)}= frac{b}{b-9}$
2. $frac{b(b-1)}{(b-1)(b+1)} = frac{b}{b+1}$
3. $frac{b(b+10)}{(b-10)(b+10)} = frac{b}{b-10}$
4. $frac{b(b-9)}{(b-9)(b+9)} = frac{b}{b+9}$

Answer 2

1)  b*(b + 9) / (b - 9)*(b + 9) = b/(b - 9)
2)  b*(b - 1) / (b -1)*(b / (b + 1) = b / ( b + 1)
3) b*(b + 10) / (b - 10)*(b + 10) = b / (b - 10)
4)  b*(b -  9) / (b - 9)*(b + 9) = b/(b + 9)