is used<span> to write very large or very small numbers using less digits. Discover examples of </span>scientific notation used<span> in </span>real life<span> and acquire the comprehension of complex concepts such as polynomials and exponents.</span>
we have

Step 1
Eliminate the parenthesis

Step 2
Group terms that contain the same variable

Step 3
Combine like terms

therefore
the answer is

Answer:
B
Step-by-step explanation:
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Good luck on your assignment hope this helps!:)