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p in (-oo:+oo)
2^2*(p+3/2) = 12 // - 12
2^2*(p+3/2)-12 = 0
4*(p+3/2)-12 = 0
4*(p+3/2)-12 = 0
4*p-6 = 0
4*p-6 = 0
4*p-6 = 0 // + 6
4*p = 6 // : 4
p = 6/4
p = 3/2
p = 3/2
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