x=(√3+√2)/(√3-√2)=(√3+√2)²/[(√3-√2)(√3+√2)]=(√3+√2)²=5+2√6 x²-10x+4 =x²-10x+25-21 =(x-5)²-21 =(5+2√6-5)²-21 =(2√6)²-21 =24-21 =3
解答一 举报 x=(根号3-根号2)/(根号3+根号2) =5-2根号6 y=(根号3+根号2)/(根号3-根号2)=5+2根号6 y/x^2+x/y^2=(x^3+y^3)/x^2y^2 =(x+y)(x^2-xy+y^)/x^2y^2=970 解析看不懂?免费查看同类题视频解析查看解答 相似问题 已知x=根号3+根号2,y=根号3-根号2,求x的三次方y+...
xy=(√3+√2)^2(√3-√2)^2=(3-2)^2=1 x-y=(√3+√2)^2-(√3-√2)^2=4√3x√2=4√6 x+y=(√3+√2)^2+(√3-√2)^2=2x3+2x2=10 (x^3-xy^2)/(x^4y+2x^3y^2+x^2y^3)=(x^2-y^2)/(x^3y+2x^2y^2+xy^3)=(x^2-y^2)/xy(x^2+2xy+y^2)=...
x＋y=10 xy=1 x/y+y/x=(x+y)²-2xy=10²-2=98
答案 x=2分之根号3-根号2 y=2分之根号3+根号2xy=1/4y-x=根号2相关推荐 1已知:x=根号3-根号2分之根号3+根号2,y=根号3+根号2分之根号3-根号2,求x四次方y+2x x的四次方y+2x的立方y的平方+x的平方y的立方分之x的立方-xy的平方 反馈 收藏 ...
x=(根号3-根号2)/(根号3+根号2)=(根号3-根号2)^2/((根号3)^2-(根号2)^2) =5-2倍根号6 y=(根号3+根号2)/(根号3-根号2)=(根号3+根号2)^2/((根号3)^2-(根号2)^2)=5+2倍根号6 3x^2-5xy+3y^2=3(x^2-2xy+y^2)+xy =3(x-y)^2+(5-2倍根号6)(5+2倍根号6) =3(-4倍...
分母有理化 x=(√3-√2)²/(3-2)=5-2√6 原式=25-20√6+24-50+20√6+1 =0
x=(√3-√2)/(√3+√2)=(√3-√2)²/(√3+√2)(√3-√2)=(√3-√2)²=5-2√6 y=(√3+√2)/(√3-√2)=(√3+√2)²/(√3+√2)(√3-√2)=(√3+√2)²=5+2√6 ∴x+y=10 xy=1 ∴2x²-3xy+2y²=2x²+4xy+2y&#...
x=根号3-根号2/根号3+根号2=(√3-√2)²/(√3+√2)(√3-√2)=(√3-√2)²=3-2√6+2=5-2√6y=根号3+根号2/根号3-根号2=(√3+√2)²/(√3+√2)(√3-√2)=(√3+√2)²=3+2√6+2=5+2√6 ∴3x²-5xy-3y²=3*(5-2√6)²-5*(5-2√6)(5+2√6)-3*(...
x=(√3+√2)/(√3-√2)=(√3+√2)²/[(√3-√2)(√3+√2)]=(√3+√2)²=5+2√6 x²-10x+4 =x²-10x+25-21 =(x-5)²-21 =(5+2√6-5)²-21 =(2√6)²-21 =24-21 =3 ...