How do you simplify $5 k + 3 k^{3} + 7 k + 9 k^{3}$ $5k+3k^3+7k+9k^3$ ?

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Answer 1 · 2018-03-25T16:14:08

$12 k^{3} + 12 k$ $12k^3+12k$

Identify and then add the like terms.

$color(blue)(5k)" "color(red)(+ 3k^3)" "color(blue)(+7k)" "color(red)(+9k^3)$

$=color(blue)(5k+7k)" "color(red)(+ 3k^3+9k^3)$

$=color(blue)(12k)" "color(red)(+ " "12k^3)$

How do you simplify 5k+3k^3+7k+9k^35k+3k3+7k+9k35k+3k^3+7k+9k^3?