(1+根号2)X^2-(1-根号2)X=0 9(2X-1)-4(2X+3)=0 3X^2+10X+4=0

(1+根号2)X^2-(1-根号2)X=0 9(2X-1)-4(2X+3)=0 3X^2+10X+4=0

(1+√2)X^2-(1-√2)X=0
X[(1+√2)X-(1-√2)]=0
X=0またはX=(1-√2)/(1+√2)
X=0またはX=(1-√2)^2/(1+√2)(1-√2)
X=0またはX=-(1-√2)
X=0またはX=2√2-3
9(2X-1)-4(2X+3)=0
[3(2X-1)-2(2X+3)[3(2X-1)+2(2X+3)]=0
(6X-3-4X-6)(6X-3+4X+6)=0
(2X-9)(10X+3)=0
X=9/2またはX=-3/10
3X^2+10X+4=0
X^2+10X/3+4/3=0
X^2+10X/3+25/9-25/9+4/3=0
(X+5/3)^2-13/25=0
(X+5/3-√13/5)(X+5/3+13/5)=0
X=-5/3+√13/5/2またはX=X=-5/3√13/5/2