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dlinn [17]
3 years ago
10

Which of the following is equal to sqrt 50a^6b^7

Mathematics
1 answer:
emmasim [6.3K]3 years ago
3 0
Your question implies there are choices given with possible answers. As I do not have those in front of me, I will show you how to simplify the radical. It is likely that the answer you seek is the simplified radical.

To simplify \sqrt{50 a^{6}  b^{7} } we use the following identity: for positive values of a and b, \sqrt{ab}= \sqrt{a}  \sqrt{b}

That identity allows us to re-write what we are given as \sqrt{50} \sqrt{ a^6 } \sqrt{b^{7}. Let us now consider each of these separately.

Though 50 is not a perfect square it can be written as 25 x 2 and 25 is a perfect square. Thus, we obtain \sqrt{50}= \sqrt{25} \sqrt{2}=5 \sqrt{2}

Next we consider a^{6} which is a perfect square as it is equal to (a^{3})  (a^{3}). Thus, \sqrt{a^{6}} = a^{3}

Lastly, we consider b^{7} which can be written as (b^{1})( b^{6}) and since b^{6} is a perfect square we obtain the following: \sqrt{b ^{7} } =\sqrt{b ^{1}} \sqrt{b^6} = b^{3}  \sqrt{b}

Putting that all together we obtain \sqrt{50 a^{6} b^{7} }=25a ^{3}b ^{3} \sqrt{2b}
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