## Algebra: A Combined Approach (4th Edition)

$2x^2-2x+19$
$(2x^2+3x+12)-(5x-7)$ First we change the sign of each term of the second polynomial, and then we add the result to the ﬁrst polynomial. $=2x^2+3x+12-5x+7$ Group like terms $=2x^2+3x-5x+7+12$ Combine like terms $=2x^2-2x+19$