(3-2х)^2=16 решите !!!

Question

(3-2х)^2=16 решите !!!

Answer 1

3-2x=4 и 3-2x=-4
-2x=1      -2x=-7
x=1:(-2)=-0.5       x=-7:(-2)=3.5

Answer 2

(3-2х)²=16
9-12х+4х²=16
4х²-12х-16+9=0
4х²-12х-7=0
D=b²-4ac
D=144-4*4*(-7)=256; √D=16
х1=12+16:8=3,5
х2=12-16:8=-0,5