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Sehingga:
(p+4)² - 4.1.(4½) < 0
(p+4)² - 16 < 0
p² - 8p + 16 - 16 < 0
p² - 8p < 0
p(p - 8) < 0
p = 0 V p = 8
masukkan ke garis bilangan, sehingga 0<p<8