Question

Ma ajuta si pe mine cineva va rog mult

Answer 1

$a).|1- \sqrt{7} |= \sqrt{7} -1 \\ b).|- \sqrt{3} - \sqrt{2} |= \sqrt{3} + \sqrt{2} \\ c).|8- \sqrt{49} |=8-7|=|1|=1 \\ d).|(3- \sqrt{2} )^2|=|3^2-2 \cdot 3 \cdot \sqrt{2} + \sqrt{2} ^2|=|9-6 \sqrt{2} +2|= \\ =|11-6 \sqrt{2} |=11-6 \sqrt{2}$