(√3+√2)x^2+2*√3x+(√3-√2)=0
分解
√3x^2+2*√3x+√3=√2 - √2x^2
√3(x+1)^2=√2(1-x^2)=√2(1+x)(1-x)
√3(x+1)=√2(1-x)
得x=-1/(5+2√6)