18x^2 + 6+4x - 15x^2 - 4 + 13x

My Answer 3x^2 + 17x + 2

good answer

To simplify the expression 18x^2 + 6+4x - 15x^2 - 4 + 13x, you can start by combining like terms.

Like terms are terms that have the same variable(s) raised to the same exponent(s). In this expression, the terms are 18x^2 and -15x^2 (both have x^2), 4x and 13x (both have x), and 6, -4, and 2 (all are constants).

Combine the like terms with the same exponents:

18x^2 - 15x^2 = 3x^2
4x + 13x = 17x
6 - 4 + 2 = 4

Therefore, the simplified expression is 3x^2 + 17x + 4