Answer all the questions below and press submit to see how many you got right.
Expression : An expression is a succession of constants, variables and mathematical operations that if evaluated for specific values of the variables represents a number.
Variable : A letter in an expression or function that represents an arbitrary number.
$3x^2+5x-1=?$ for $x=4$.
$4x^2+1x+2=?$ for $x=3$.
Squared : $x$ squared refers to the number $x^2=x\cdot x.$ For example 3 squared equals 9.
$2x^2+4x-2=?$ for $x=-5$.