Question

If a+25/a=-5 then a^3-100=?​

Answer 1

Answer:

$\frac{a + 25}{a} = - 5 \\ \frac{a}{a} + \frac{25}{a} = - 5 \\ a = - 5 \times 25 \\ a = - 125 \\ \\ then.. \\ {a}^{3} - 100 = \\ ( - 125) {}^{3} - 100 \\ 1953125 - 100 \\ = 1953025$

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