Question 81294
<pre><font size = 4><b>
Which label describes the following?
7x² – 3 = 0

Expression

No, it's not an expression.  Expressions have no equal sign.

Linear equation

No, it's an equation because it has an equal sign, but it is not
a linear equation because a linear equation has only the 
FIRST power of x, not any higher powers.  This one has a 
term in x², which is not allowed in a linear equation.

Equation which is not linear

Yes, this is the right choice.  It is a quadratic equation, not
a linear equation.

Edwin</pre>