Answer:
(i) \[4p+7=4(-2)+7=-8+7=-1\]. (ii) \[-3{{p}^{2}}+4p+7=-3{{(-2)}^{2}}+4(-2)+7\] \[=-12-8+7=-20+7\] \[=-13\]. (iii) \[-2{{p}^{3}}-3{{p}^{2}}+4p+7=-2{{(-2)}^{3}}-3{{(-2)}^{2}}+4(-2)+7\] \[=-2(-8)-3(4)-8+7\] \[=16-12-8+7\] \[=16+7-12-8\] \[=23-20=3\].
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