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

$6x^{5}+0x^{4}+x^{3}+0x^{2}-3x+15$
$6x^{5}+x^{3}-3x+15$ Insert a missing term of $0x^{4}$: $6x^{5}+x^{3}-3x+15=6x^{5}+0x^{4}+x^{3}-3x+15=...$ Insert a missing term of $0x^{2}$: $...=6x^{5}+0x^{4}+x^{3}+0x^{2}-3x+15$