ich gehe mal aus von
187500+1500P-300P2 = 0 | : (-300) und umstellen:
p2 - 5·p - 625 = 0
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x2 - 5x - 625 = 0
pq-Formel: p = -5 ; q = - 625
x1,2 = - p/2 ± \(\sqrt{(p/2)^2 - q}\) = 5/2 ± \(\sqrt{(25/4 + 625}\)
.....
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p1 = 5·√101/2 + 5/2 ; p2 = 5/2 - 5·√101/2
p1 ≈ 27.62468905 ; p2 ≈ - 22.62468905
Gruß Wolfgang