Răspuns:
Explicație pas cu pas:
a)
x^2 = 2*2 = 4
S = {-2; 2}
b)
x^2 = 12/5 : 3/5 = 12/5 * 5/3 = 4
S = {-2; 2}
c)
x^2 = 8/45 : 2/5 = 8/45 * 5/2 = 4/9
S = {-2/3; 2/3}
d)
x^2 = 3/10 * 20/3 = 2
S = {-√2; √2]
e)
x^2 = -6/5 * 5/6 = -1
nu are solutii in R
S = ∅
f)
x^2 = 10/7 - 3/7 = 7/7 = 1
S = {-1; 1}
