Question

27. 2 square root 5+3 square root 7 ^2
(4 points)

Answer 1

Is this your question
\[2\sqrt {5} + 3 \sqrt {7^2}\]?

Answer 2

yes

Answer 3

We have
\[2\sqrt 5+ 3\sqrt {7^2}\]
We know
\[\sqrt {a^2}= \sqrt {a\times a}=a\]
so
\[2\sqrt 5+ 3 \times 7\]
\[21+ 2\sqrt 5\]
either we can leave here , or we can substitute the value of \(\sqrt 5 = 2.23\)
so
we get
\[21 +2 \times 2.23=21+4.46=25.46\]