Identify the terms and like terms in the expression -9 + x*2 - 3x*2 + 4x

Step-by-step explanation:

The expression -9 + x*2 - 3x*2 + 4x has the following terms:

-9, x^2, -3x^2 and 4x.  Please note:  x^2 is correct if you meant "the square of x."

a) there is only one constant term; it is -9.

b) there are two terms involving x^2:  x^2 and -3x^2.  Combining them results in -2x^2.

c) there is only one term involving x:  It is 4x.

d) -9 + x*2 - 3x*2 + 4x becomes -2x^2 + 4x - 9.  Again, please use " ^ " to indicate exponentiation.