Question

Let’s find the value of (a3+27)by calculating if a+9/a=3

Answer 1

Answer:

$\frac{a + 9}{a} = 3 \\ = > a + 9 = 3a \\ = > 2a = 9 \\ = > a = \frac{9}{2} or4.5 \\ \\ a \times 3 + 27 = \frac{9}{2} \times 3 + 27 = \frac{27}{2} + 27 = \frac{81}{2} or \: 40.5$