1. (x-3)^2=12
2. (x+1)^2=8
1. x^2-6x+9=12
x^2-6x+9-12=0
x^2-6x-3=0
D=(-6)^2-4*1*(-3)=36+12=48
x1=(-(-6)+V48)/2=(6+V48)/2
x1=6/2+(V16*3)/2=6/2+4*V3/2
x1=3+2V3
x2=(-(-6)-V48)/2=(6-V48)/2
x2=6/2-(V16*3)/2=6/2-4*V3/2
x2=3-2V3
2. (x+1)^2=8
x^2+2x+1=8
x^2+2x+1-8=0
x^2+2x-7=0
D=2^2-4*1*(-7)=4+28=32
x1=(2+V32)/2
x1=2/2+4*V2/2
x1=1+2V2
x2=(2-V32)/2
x2=2/2-4*V2/2
x2=1-2V2
V-корень
^-степень
x^2-6x+9=12
x^2-6x-12+9=0
x^2-6x-3=0
x1+x2=6
x1*x2=-3
x^2+2x+1=8
x^2+2x+1-8=0
x^2+2x-7=0
x1+x2=-2
x1*x2=-7