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Ruthorse
20 * b(squared) would be the simplification of b5 * b4
You are just multiplying the two number together. You just have to remember that b4 is  just b * 4...  So b * 4 * b * 5 would equal 20 * b squared 

Answer:

[tex]b^5 \cdot b^4=b^9[/tex]

Step-by-step explanation:

the correct simplification of the expression [tex]b^5 \cdot b^4[/tex]

To multiply the exponents we use exponential property

[tex]a^m \cdot a^n = a^{m+n}[/tex]

when the base are same and the exponents are in multiplication then we add the exponents.

[tex]b^5 \cdot b^4=b^{5+4}[/tex]

We add the exponents 4+5 becomes 9

[tex]b^5 \cdot b^4=b^9[/tex]

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