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Rebecca solved √45 + 2 √20. Her answer was 5 √5 . Is she correct? If not, explain and correct the error.

Rebecca solved √45 + 2 √20. Her answer was 5 √5 . Is she correct? If not, explain and correct the error.
asked 151k views
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Rebecca solved

√45 + 2 √20. Her answer was 5 √5 . Is she correct? If not, explain and correct the error.

Rebecca solved √45 + 2 √20. Her answer was 5 √5 . Is she correct? If not, explain-example-1
asked
User Linschlager
by
7.5k points

1 Answer

10 votes

No.


√(45)=3√(5) \\2√(20) =2\sqrt5}

If you add them up you DO NOT GET
5√(5). According to mathematics, it equals to
7√(5).

answered
User Felixfbecker
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8.2k points
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