Question

Mă puteți ajuta,vă rog?

Answer 1

$2308=48^{2},\ 125=15^{2},\ 1225=35^{2},\ 1600=40^{2},\ 324=18^{2}, 144=12^{2}, 25=5^{2},\ 49=7^{2},\ 16=4^{2}, 36=6^{2}\\\\a) 48*(15-35)+40=48*(-20)+40=-960+40=-920\\\\b)\sqrt{5*5}+ \sqrt{7*7}- \sqrt{9*4}=5+7-6=6\\\\c)\sqrt{1+7*5}- \sqrt{11*6-2}+ \sqrt{23*3+3*4}=\sqrt{36}- \sqrt{64}+ \sqrt{81}=6-8+9=7\\\\d)\sqrt{12+13} +\sqrt{3*18+7*15-8-7}= \sqrt{25} +\sqrt{144}=5+12=17$