1)(х - 2,5)^2 =49
(x^2)-5x+6.25=49
x^2-5x-42.75=0
D=25+171=196=14^2
x1= 5-14= -4.5
2
X2=5+14=9.5
(х+2)^2- 49=0
x^2+4+4x-49=0
x^2+4x-45=0
D=16-4*1*(-45)=196
х1=(-4-14)\2=-9
х2=(-4+14)\2=5
1)(х - 2,5)^2 =49
(x^2)-5x+6.25=49
x^2-5x-42.75=0
D=25+171=196=14^2
x1= 5-14= -4.5
2
X2=5+14=9.5
2
(х+2)^2- 49=0
x^2+4+4x-49=0
x^2+4x-45=0
D=16-4*1*(-45)=196
х1=(-4-14)\2=-9
х2=(-4+14)\2=5