Answer:
7b^3 + 9b^2 + 8b
Step-by-step explanation:
Combine like terms
My teacher taught me a few years ago to put like terms in the same format so they're easier to combine:
b^3 + 7b + 9b^2 + b + 6b^3
Here I have all terms to the 3rd power bolded, all terms to the 2nd power underlined, and all terms to the 1st power italicized. That makes it easier to combine those that are similar
b^3+ 6b^3 = 7b^3
9b^2 - remains the same
7b + b = 8b
Now just reorder them to where the exponents are listed from greatest to least:
7b^3 + 9b^2 + 8b
