my calculator does not resolve properly the inequalities of the second degree
me give an example: 2x ^ 2 + 5x + 3> 0 the right result is x <-3/2 vx> -1
well, why my calculator shows as a result:(x *(2x + 5))/ 2> -3/2 why ??????
helpppp,please!!!!
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my calculator does not resolve properly the inequalities of the second degree
me give an example: 2x ^ 2 + 5x + 3> 0 the right result is x <-3/2 vx> -1
well, why my calculator shows as a result:(x *(2x + 5))/ 2> -3/2 why ??????
helpppp,please!!!!
Nico,
Your ti-89 calculator shows a result that is an equivalent of your original equation:
(x*(2x+5))/2>-3/2
(2x^2+5x)/2>-3/2
2x^2+5x>-3
2x^2+5x+3>0 ->original inequality
Thus the issue is not that this is a wrong answer but rather that the calculator rewrites the equation instead of solving it.
Please refer to your manual on the proper use of the ti-89 inequality function.