Question

Rezolvati ecuatiile a)
${x}^{2} = 4$
b)
${x}^{2} = 1$
c)
${x}^{2} = 9$
d)
${x}^{2} = 0$
e)
${x}^{2} = 25$
f)
${x}^{2} = - 4$
g)
${x}^{2} = - 9$
h)
${3x}^{2} = 12$
i)
${2x}^{2} = 18$
Va rog mult!!!

Answer 1

a) x² = 4
    x = √4
    x = 2
b) x² = 1
    x = √1 
    x = 1
c) x² = 9
    x = √9
    x = 3
d) x² = 0
    x = 0 
e) x² = 25
    x = √25
    x = 5
f) x² = - 4
   x = -√4
   x = - 2
g) x² = - 9
    x = - √3
    x = - 3
h) 3x² = 12
    x² = 12/3 = 4
    x = √4
    x =  2
i) 2x² = 18
   x² = 18/2 = 9
   x² = √9
   x = 3