1b) 2x^2=32
x^2=32:2
x^2=16
x=+-4
c)x^2-49=0
x^2=49
x=+-7
3b)4supra9=16supra x^2
4x^2=16*9
4x^2=144
x^2=144:4
x^2=36
x=+-6
c) xsupra4=25suprax
x^2=100
x=+-10
4b) (2x-3)^2=121
4x^2 -12x+9=121
4x^2-12x-112=0 |:4
x^2 -3x-28=0
delta=b^2-4ac
=9+4*28=9+112=121
x1,2=-b+-radical din delta totul supra 2a
x1,2=3+-11 supra 2
x1=-8supra2=-4
x2=14supra2=7
c) (x+4)^2-196=0
x^2+8x+16-196=0
x^2+8x-180=0
delta=64+4*180=64+720=784
x1,2=-8+-28 supra 2
x1=-10
x2=18
5b)3x^2=3468
x^2=3468:3
x^2=1156
x=+-34
c) 2x^2 -432=1136
2x^2=1136+432
2x^2=1568
x^2=1568:2
x^2=784
x=+-28
sper ca te-am ajutat, exercitiul 2 dau rezultatul cu virgula si nu cred ca trebuie asa
