Choose the correct simplification of the expression (5a^7b)^2.
25a^14b^2
25a^9b^2
25a^14b
10a^14b^2

Question

anonymous · Answer

$$5^2a^{7\times 2}b^2$$ is a start

anonymous · Answer

well i dont know how to finish it. i dont think re writing the main equation is going to help.

anonymous · Answer

i changed a few things, for example now we have $5^2$ and $5^2=25$

anonymous · Answer

also we have $7\times 2$ and $7\times 2=14$

anonymous · Answer

oh okay. i didnt see that. i still dont have a clue how to do exponents.

anonymous · Answer

so the entire expression becomes 
$$25a^{14}b^2$$

anonymous · Answer

oh okay. uhm not entirely sure how u came to that.

anonymous · Answer

i raised everything inside the parentheses to the power of two

anonymous · Answer

and also used $(a^7)^2=a^{7\times 2}=a^{14}$

anonymous · Answer

oh okay thanks !