Question

What is the sign of `a^72 * (-3/7)` when `a` is a negative number?

Answer 1

Negative.

Explanation:

Any real number raised to an even power is going to be positive.

`\therefore a^{72}` is positive.

Since a positive times a negative is negative,

`a^{72}\cdot(-\frac{3}{7})` is negative.