a) [tex]\sqrt{2304}[/tex] · [tex]( \sqrt{225} - \sqrt{1225} ) + \sqrt{1600}[/tex] =
= [tex]48[/tex] · [tex]( 15 - 35) + 40[/tex] =
= [tex]48[/tex] · [tex](-20) + 40[/tex] =
= [tex]-960 + 40[/tex] =
= - 920
b) √5·√25 + √7·√49 - √9·√16 =
= √5·5 + √7·7 - √9·4 =
= √5² + √7² - 3 · 2 =
= 5 + 7 - 6 =
= 6
c) √1 + 7√25 - √11√36 - 2 + √23√9 + 3√16 =
= √1 + 7 · 5 - √11 · 6 - 2 + √23 · 3 + 3 · 4 =
= [tex]\sqrt{1+35} - \sqrt{66-2} + \sqrt{69 + 12}[/tex] =
= [tex]\sqrt{36} - \sqrt{64} + \sqrt{81}[/tex] =
= 6 - 8 + 9 =
= 7
d) [tex]\sqrt{\sqrt{144} + 13 }[/tex] [tex]+ \sqrt{3\sqrt{324} + 7\sqrt{225} - \sqrt{64} -7 }[/tex] =
= [tex]\sqrt{12+13}[/tex] + √3 · 18 + 7 · 15 - 8 - 7 =
= [tex]\sqrt{25} + \sqrt{54+105-8-7}[/tex] =
= [tex]5 + \sqrt{144}[/tex] =
= [tex]5+12[/tex] =
= 17
Sper că te-am ajutat, o zi frumoasă!
