1.a、b是整数,二元一次方程x^2+ax+b=0有一根为√(7-4√3),求a+b.2.已知X=√(19-8√3),求(x^4-6x^3-2x^2+18x+23)/x^2-8x+15的值.3.已知x^4-5x^3+8x^2-5x+1=0,求x+1/x的值老头老太111:第一题为什么x1=x2?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 12:55:15
![1.a、b是整数,二元一次方程x^2+ax+b=0有一根为√(7-4√3),求a+b.2.已知X=√(19-8√3),求(x^4-6x^3-2x^2+18x+23)/x^2-8x+15的值.3.已知x^4-5x^3+8x^2-5x+1=0,求x+1/x的值老头老太111:第一题为什么x1=x2?](/uploads/image/z/7803880-16-0.jpg?t=1.a%E3%80%81b%E6%98%AF%E6%95%B4%E6%95%B0%2C%E4%BA%8C%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8Bx%5E2%2Bax%2Bb%3D0%E6%9C%89%E4%B8%80%E6%A0%B9%E4%B8%BA%E2%88%9A%EF%BC%887-4%E2%88%9A3%EF%BC%89%2C%E6%B1%82a%2Bb.2.%E5%B7%B2%E7%9F%A5X%3D%E2%88%9A%2819-8%E2%88%9A3%29%2C%E6%B1%82%28x%5E4-6x%5E3-2x%5E2%2B18x%2B23%29%2Fx%5E2-8x%2B15%E7%9A%84%E5%80%BC.3.%E5%B7%B2%E7%9F%A5x%5E4-5x%5E3%2B8x%5E2-5x%2B1%3D0%2C%E6%B1%82x%2B1%2Fx%E7%9A%84%E5%80%BC%E8%80%81%E5%A4%B4%E8%80%81%E5%A4%AA111%EF%BC%9A%E7%AC%AC%E4%B8%80%E9%A2%98%E4%B8%BA%E4%BB%80%E4%B9%88x1%3Dx2%EF%BC%9F)
xTݎ@~^)C;S@Lސ76qwEPAuO7r+xf XΛ̙|fY߹G|1Vc/7
ΦK'Gԟn+Wy`XkJy'qve.T9@תK88l=g"NZOsD4`ĆcZ $ޝDӊC^;Sxbt,h+{w? #{9S}(A9B7Lp.lZ9ϭ*OM"+p&x"杷(