(x+2)^2=10(x+2) x(x-2根号3)=3_数学解答

(x+2)^2=10(x+2) x(x-2根号3)=3

人气：218 ℃　时间：2020-06-12 08:40:29

解答

(x+2)²=10(x+2)x²+4x+4=10x+20x²-6x-16=0(x+2)(x-8)=0x=-2或x=8x(x-2√3)=3x²-2√3x+3=6(x-√3)²=6x-√3=±√6x-√3=√6或x-√3=-√6即：x=√6+√3或x=√3-√6