化简求值 (x³+4x²)÷x+(2x+1)(2x-1)-4x(x+1) x=-2

来源:学生作业帮助网 编辑:作业帮 时间:2017/12/18 01:48:38
化简求值(x³+4x²)÷x+(2x+1)(2x-1)-4x(x+1)x=-2化简求值(x³+4x²)÷x+(2x+1)(2x-1)-4x(x+1)x=-2化简

化简求值 (x³+4x²)÷x+(2x+1)(2x-1)-4x(x+1) x=-2
化简求值 (x³+4x²)÷x+(2x+1)(2x-1)-4x(x+1) x=-2

化简求值 (x³+4x²)÷x+(2x+1)(2x-1)-4x(x+1) x=-2
原式=x^2+4x+4x^2-1-4x^2-4x=x^2-1代入x=-2原式=3

原式=x²+4X+4x²-1-4x²-4X=x²-1

(x³+4x²)÷x+(2x+1)(2x-1)-4x(x+1)
=x²+4x+4x²-1-4x²-4x
=x²-1
=(-2)²-1
=4-1
=3