Răspuns:
Explicație pas cu pas:
a)
x^2 = 32 : 4 = 8
x1 = 2√2
x2 = -2√2
b)
x^2 = 20/9
x1 = √(20/9) = 2√5/3
x2 = -2√5/3
c)
x^2 = 80 : 16 = 5
x1 = √5
x2 = -√5
d)
x^2 = 27
x1 = √27 = 3√3
x2 = -3√3
e)
3x^2 = 17 + 64 = 81
x^2 = 27
x1 = √27 = 3√3
x2 = -3√3
f)
5x^2 = 23 - 8 = 15
x^2 = 15 : 5 = 3
x1 = √3
x2 = -√3