谁能把此一元二次方程解出:(29+2X)(22+2X)=29×22×(4/3)
问题描述:
谁能把此一元二次方程解出:(29+2X)(22+2X)=29×22×(4/3)
结果保留一位小数
答
(29+2X)(22+2X)=29×22×(4/3)
29*22+(29+22)2X+4X^2=29*22*4/3
4X^2+102X=29*22/3
X^2+25.5X=29^22/3
(X+12.75)^2=212.67+162.5625=375.23
X+12.75=±√375.23
x1=√375.23-12.75=6.6
x2=-√375.23-12.75=-32.1