一元二次不等式计算题能给个60~100道吗,最好有答案,
2019-06-01
一元二次不等式计算题能给个60~100道吗,最好有答案,
优质解答
14-4x平方≥x
4x²+x-14≤0(4x-7)(x+2)≤0-2≤x≤7/4x(x+2)＜x(3-x)+1x²+2x<3x-x²+12x²-x-1<0(2x+1)(x-1)<0-1/20x<-4,x>5(x+7)(2-x)＞0(x+7)(x-2)<0-7
14-4x平方≥x
4x²+x-14≤0(4x-7)(x+2)≤0-2≤x≤7/4x(x+2)＜x(3-x)+1x²+2x<3x-x²+12x²-x-1<0(2x+1)(x-1)<0-1/20x<-4,x>5(x+7)(2-x)＞0(x+7)(x-2)<0-7