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Question 1 • AZ-Common Core Algebra II A
When multiplying powers with the same base, add the exponents: 5² · 5⁹ = 5⁽²⁺⁹⁾ = 5¹¹. So the simplified expression is 5¹¹, choice A.
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Lesson 3: Laws of Exponents
Sum and Difference of Two Cubes
The Rational Roots Theorem