Question

gnt não consigo resolver isso alguém me ajuda pfff (√7+1)²

Answer 1

$( \sqrt{7} +1)^2\to \\\\( \sqrt{7} +1)*( \sqrt{7} +1)\to \\\\ \sqrt{49} + \sqrt{7} + \sqrt{7} +1\to \\\\ 7+2 \sqrt{7} +1\to \\\\ 8+2 \sqrt{7}$