Simplify this expression. If it is already simplified, then write it as it is.
4t^2 + 10t

Already simplified.

Step-by-step explanation:

The only way to simplify an expression is to combine like terms.  Like terms is where the variables are exactly the same.  t^2 is not the same as t.  Thus, cannot combine them, so the expression is already simplified,

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.