Question

add x cube minus 2x square minus 9 and 5x cube plus 2x plus 9​

Answer 1

Answer:

$6 {x}^{3}$

Step-by-step explanation:

${x}^{3} - 2 {x}^{2} - 9 \: and \: {5x}^{3} + 2x + 9$

Refer to the attachment above