Linear Algebra Examples

$3 x (2 x + x^{2}) + 5 x (3 x - 4 x^{2})$

Step 1

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

Interval Notation:

$(- \infty, \infty)$

Set-Builder Notation:

${x | x \in ℝ}$

Step 2