find the possible values of k if kx^2 + 5x + 3 = 0 has 2 solutions | Mathematics | Page 1

thorn viperBOT Apr 3, 2024, 6:03 AM

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dusty arrow Apr 3, 2024, 6:06 AM

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how do you know if a quadratic function has two solutions?

west oracle Apr 3, 2024, 6:10 AM

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discriminsnt > 0

dusty arrow Apr 3, 2024, 6:10 AM

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ok

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so can you tell me what the discriminant is

west oracle Apr 3, 2024, 6:11 AM

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25 - 4(k)(3) > 0

dusty arrow Apr 3, 2024, 6:11 AM

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yep

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so all we have to do now is solve for k

west oracle Apr 3, 2024, 6:12 AM

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oh so is the answer k < 25/12

dusty arrow Apr 3, 2024, 6:12 AM

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yep

west oracle Apr 3, 2024, 6:12 AM

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does it not have to be whole numbers/

dusty arrow Apr 3, 2024, 6:12 AM

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yes, k can be any real number

west oracle Apr 3, 2024, 6:13 AM

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ok

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btw

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in my test

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if i acidentaly rounded 7.4 as 7 but i did all the correct working out and got the answer i just rounded it wrong

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except the question said round to 1 dp

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do u think ill still get the mark??

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☹️ 🙏

dusty arrow Apr 3, 2024, 6:15 AM

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uhhhh yes

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well

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if its only 1 mark

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then probably not

west oracle Apr 3, 2024, 6:15 AM

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it was like 3

dusty arrow Apr 3, 2024, 6:15 AM

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you'll probably get 2 marks for all the right work then

#find the possible values of k if kx^2 + 5x + 3 = 0 has 2 solutions