expand and simplify (3+/7)^2

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Guest Nov 30, 2014

+118723

+5

Best Answer

$$\\(3+\sqrt7)^2 \\\\
=3^2\;+\;2*3*\sqrt7\;+\;(\sqrt7)^2\\\\
=9+6\sqrt7+7\\\\
=16+6\sqrt7$$

Melody Nov 30, 2014

Melody · Answer 1 · 2014-11-30T03:46:53

$$\\(3+\sqrt7)^2 \\\\
=3^2\;+\;2*3*\sqrt7\;+\;(\sqrt7)^2\\\\
=9+6\sqrt7+7\\\\
=16+6\sqrt7$$

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Melody · Answer 2 · 2014-11-30T03:22:18

What is the stroke in front of the 7 for?

Guest · Answer 3 · 2014-11-30T03:32:04

its a surd