Need help

K

kokshen3414

Feb 2019
2
0
US
Need help with 11)，12）


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P

Plato

MHF Helper
Aug 2006
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kokshen3414 said:
Need help with 11)，12）

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Do not ever post the same question twice.
The quadratic $ax^2+bx+c=0$ has two real roots if and only if $b^2-4ac>0$.
That is the idea for both 11 & 12.
 
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