Question

Сократите алгебраическую дробь : (7b-14b^2)/(42b^2-21b)

Answer 1

$frac{7b - 14 {b}^{2} }{42 {b}^{2} - 21b } = frac{7b(1 - 2b)}{21b(2b - 1)} = - frac{(2b - 1)}{3(2b - 1)} = - frac{1}{3}$

Answer 2

$frac{7b-14 b^{2} }{42 b^{2}-21b }= frac{7b(1-2b)}{21b(2b-1)} = -frac{1}{3}$