Question

Сократи дробь d³-d²-4d+4/d³-4d​

Answer 1

$\frac{d^{3}-d^{2}-4d+4}{d^{3}-4d }=\frac{(d^{3}-d^{2})-(4d-4)}{d(d^{2} -4)}=\frac{d^{2}(d-1)-4(d-1) }{d(d^{2}-4) }=\frac{(d-1)(d^{2}-4) }{d(d^{2}-4) }=\boxed{\frac{d-1}{d}}$