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 2 years ago
Find the constant k so that the quadratic equation 2x^2 + 5x  k = 0 has two real solutions?
 2 years ago
Find the constant k so that the quadratic equation 2x^2 + 5x  k = 0 has two real solutions?

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terenzreignz
 2 years ago
Best ResponseYou've already chosen the best response.0Quadratic Formula!!! :D

aroub
 2 years ago
Best ResponseYou've already chosen the best response.2First you find the delta: b^24ac 5^24(2)(k) 25+8k because it has two real solutions..so, 25+8k>0 8k>25 k>25/8

HighlyEducated87
 2 years ago
Best ResponseYou've already chosen the best response.0Good Job u got it 1st!!!!!

terenzreignz
 2 years ago
Best ResponseYou've already chosen the best response.0\[\frac{b \pm \sqrt{b^{2}4ac}}{2a}\] Yeah, as per @aroub delta (I thought it was discriminant) determines the number of roots you have, as well as their nature... Delta is that expression in the radical in the quadratic formula :D

HighlyEducated87
 2 years ago
Best ResponseYou've already chosen the best response.0It is discriminant but i didn't need a quadratic formula.

aroub
 2 years ago
Best ResponseYou've already chosen the best response.2When you want to find K, no need!

HighlyEducated87
 2 years ago
Best ResponseYou've already chosen the best response.0i know!!! Thanks
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