## Precalculus: Mathematics for Calculus, 7th Edition

$x^{2}-6x+17$
Expand the brackets, be mindful of the negative sign: $=4x^{2}-12x+20-3x^{2}+6x-3$ Collect the like terms: $=(4-3)x^{2}+(-12+6)x+(20-3)$ $=x^{2}-6x+17$