Mathematics: Help me match these??????? please and thank you

Area of rectangle: w * lFirst rectangle: 21 * 18Second rectangle: 17 * 9(21 * 18) + (17 * 9) = 378 + 153Solution: 531 in^3The answer is B...

Help me match these??????? please and thank you

s9090484

19.08.2021

$\sqrt{12}=2\sqrt{3}$

$\sqrt{18} = 3\sqrt{2}$

$\sqrt{24}=2\sqrt{6}$

$\sqrt{72}=6\sqrt{2}$

Step-by-step explanation:

Hi there!

$\sqrt{12}$

To simplify a square root, check if the radicand has any perfect square factors. For example, 12 can be rewritten as 4*3:

$=\sqrt{4*3}\\=\sqrt{4}*\sqrt{3}$

4 is a perfect square. Its square root is 2:

$=2*\sqrt{3}\\=2\sqrt{3}$

$\sqrt{18} \\= \sqrt{9*2} \\= 3\sqrt{2}$

$\sqrt{24} \\=\sqrt{4*6}\\=2\sqrt{6}$

$\sqrt{72} \\=\sqrt{36*2} \\=6\sqrt{2}$

I hope this helps!

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