答:
x²+5x-988=0
x²+5x=988
x³+6x²-933x+1014
=(988-5x)x+6x²-933x+1014
=x²+55x+1014
=988+50x+1014
=50x+2002
把x从一元二次方程里面解答出来,然后代入可得(有两个值)
怀疑933应该是983?
答:
x²+5x-988=0
x²+5x=988
x³+6x²-933x+1014
=(988-5x)x+6x²-933x+1014
=x²+55x+1014
=988+50x+1014
=50x+2002
把x从一元二次方程里面解答出来,然后代入可得(有两个值)
怀疑933应该是983?