Algebraic Number/Examples/-7

Example of Algebraic Number

$-7$ is an algebraic number.

Proof

$-7$ is a root of $x + 7 = 0$.

Hence the result by definition of algebraic number.

$\blacksquare$

Sources

• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): algebraic number
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): algebraic number