#### Answer

$x^{2}$ - 3x + 4; Quadratic trinomial

#### Work Step by Step

STEP 1: Write out the original expression.
$x^{2}$ + 4 - 3x
The expression has 3 terms in it, thus classifying itself as a trinomial
STEP 2: Arrange the trinomial into standard form, meaning that the terms are listed from greatest exponent value to the least exponent value.
$x^{2}$ - 3x + 4
The degree is the greatest exponent value, and in $x^{2}$ - 3x + 4, the degree is 2. The name of a trinomial with a degree of 2 is a quadratic trinomial.