Question

2x的平方+3x=3,x等于多少

Answer 1

2x²+3x=3

2(x²+3x/2)=3

x²+3x/2=3/2

x²+3x/2+(3/4)²=3/2+(3/4)²

(x+3/4)²=33/16

x+3/4=±√(33/16)

x+3/4=±√33/4

x=(-3+√33)/4或x=(-3-√33)/4