add the polynomials. \$(6x^2 - 8x + 1) + (7x^3 - 9x)\$ the sum is \\(…

$add the polynomials. \$(6x^2 - 8x + 1) + (7x^3 - 9x)\$ the sum is \\(…$

add the polynomials.
\$(6x^2 - 8x + 1) + (7x^3 - 9x)\$

the sum is \$\square\$. (simplify your answer.)

$6x^2 - 8x + 1 + 7x^3 - 9x$

$7x^3 + 6x^2 + (-8x - 9x) + 1$

$7x^3 + 6x^2 - 17x + 1$

$7x^3 + 6x^2 - 17x + 1$