Question

Calcule
a) √(-5)²-4·1·6 =

b)5³√-8+12-⁴√81 =

c)-(-7)+√1
________ =
2·6

Answer 1

a) $\sqrt{(-5)^2-4*1*6}$  =  -29

b) $5^{3} \sqrt{-8+ 12^{-4} } \sqrt{81}$ = 9+250$\sqrt{2}$

c) $[tex]-(-7)+ \sqrt{1}/2*6$ = 10 

Answer 2

a) √(25) - 24 = 5 - 24 = -19
b) 5 ³√-8 + 12 - ⁴√81 = (5 * 2i) + 12 - 3 = 10i + 9
c) 7 + √1 = 8
2*6= 12
8/12 = 3/4