$$( \sqrt { 15 } + \sqrt { 2 } ) ^ { 2 }$$
$2\sqrt{30}+17\approx 27.95445115$
$$\left(\sqrt{15}\right)^{2}+2\sqrt{15}\sqrt{2}+\left(\sqrt{2}\right)^{2}$$
$$15+2\sqrt{15}\sqrt{2}+\left(\sqrt{2}\right)^{2}$$
$$15+2\sqrt{30}+\left(\sqrt{2}\right)^{2}$$
$$15+2\sqrt{30}+2$$
$$17+2\sqrt{30}$$
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$2 \sqrt{30} + 17 = 27.95445115$
