Respostas

2014-04-17T22:28:20-03:00
A) (-4)² - 3 => 16 - 3 = 13
b) 7 -  \sqrt{25} => 7 - 5 = 2
c)  \sqrt{0} + \sqrt{1} => 0 + 1 = 1
d)  \sqrt{81} + \sqrt{144} => 9 + 12 = 21
e) 2 ×  \sqrt{49} -3  \sqrt{4} => (2 × 7) - (3 × 2) => 14 - 6  = 8