Question

Упрости выражение 81d^2/9d−w + w^2/w−9d

Answer 1

Пошаговое объяснение:

$\frac{81d {}^{2} }{9d - w} + \frac{w {}^{2} }{w - 9d} = \frac{81d {}^{2} }{9d - w} + \frac{w {}^{2} }{ - (9d - w)} = \frac{81d {}^{2} }{9d - w} - \frac{w {}^{2} }{9d - w} = \frac{81d {}^{2} - w {}^{2} }{9d - w} = \frac{(9d - w) \times (9d + w)}{9d - w} = 9d + w$