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1 Pure Mathematics

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Question 293
a.

Derive an exact formula in terms of p p\,p for both roots, using a completed-square representation of x2+px+4=0x^2 + px + 4 = 0x2+px+4=0

[3]
b.

Hence find the set of values of p p\,p for which the equation has no real roots.

[2]
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