Quadratic functions homework help | Mathematics | Page 1

latent perch Feb 24, 2023, 9:36 AM

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I need help with ex. 6 and 7. I dont understand the problem 😀

ripe elm Feb 24, 2023, 10:03 AM

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if the discriminant is zero, then the quadratic equation has one root, and the discriminant is equal (in the general case, if we have a quadratic equation ax²+bx+c) √(b²-4ac).
so in our case:

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√(p²-8)=0;
p²-8=0;
p²=8
p=+-2*√2

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it`s for (6)

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for (7):
what is m?

latent perch Feb 24, 2023, 10:10 AM

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I think they mean that m = k.

ripe elm Feb 24, 2023, 10:14 AM

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ok, then:
D(discriminant) > 0, so √(4²-4k)>0;
4²-4k>0;
4²>4k;
16>4k;
4>k;
so k є (-∞; 4)

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where 'є' it belongs

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belongs to this interval

#Quadratic functions homework help