Question

calcule:
a). √49+√16
b). 18+2√50
c). √8-√16

Answer 1

$a) \\ \\ \sqrt{49} + \sqrt{16} \\ \\ 7 + 4 => 11$

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$b) \\ \\ 18 * 2 \sqrt{50} \\ \\ 18 * 2 \sqrt{2 * 5^2} \\ \\ 18 * 2 * 5\sqrt{2} \\ \\ 18 * 10 \sqrt{2} => 180 \sqrt{2}$

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$c) \\ \\ \sqrt{8} - \sqrt{16} \\ \\ \sqrt{2^3} - 4 \\ \\ 2 \sqrt{2} - 4 => -4 + 2 \sqrt{2}$