8Xx(2X-1)-2x(X-1)=4X+58
问题描述:
8Xx(2X-1)-2x(X-1)=4X+58
答
8Xx(2X-1)-2x(X-1)=4X+5816x²-8x-2x²+2x=4x+5814x²-10x-58=07x²-5x-29=0用求根公式a=7,b=-5,c=-29△=b²-4ac=25+812=837x=[-b±√(b²-4ac)]/2a=[5±3√93]/14...