用配方法证明无论x为何值时,代数式2x-4x+6的值恒大于零 ,

相关推荐

• 用配方法证明：（1）-(x平方）+6x-10的值恒小于零;（2）4（x平方）-12x+10的值恒大于零
• 已知代数式-x2+6x-10 （1）用配方法证明：不论x为何值，代数式的值总为负数； （2）当x为何值时，代数式的值最大？最大值是多少．
• 用配方法求证：无论x取何实数,代数式4x^2+8x+5的值总大于零.
• 用配方法说明代数式2x^2-2x+5的值恒大于零
• 用配方法说明无论x为何值,代数式x-7x+13总大于0.并探究x为何值时,代数式有最小值,其最小值是多少?
• 用配方法证明:不论x取任何实数,代数式x^2-4x+13的值恒大于零
• 用配方法证明:无论a取何值,代数式a²-6a+19/2的值恒大于零
• 试证明,不论x为何值时,代数式2x^2-6x+5=0的值总大于零.
• 已知代数式-x的平凡+6x-10.用配方法证明：无论x为何只,代数式-x的平方+6x-10的值总是负数
• 用配方法说明代数式中x平方-12x+40的值恒大于零
• 英语翻译翻译 people liked his stories because they were easy to understand and they would finish with a sudden change at the end翻译后面的就行
• There were as many serious problems when cars were parked as when they were traveling at 90 m/h