Answer:
(i) \[2a+2b=2(0)+2(-1)=0-2=-2\]. (ii) \[2{{a}^{2}}+{{b}^{2}}+1=2{{(0)}^{2}}+{{(-1)}^{2}}+1\] \[=0+1+1=2.\] (iii) \[2{{a}^{2}}b+2a{{b}^{2}}+ab=2{{(0)}^{2}}(-1)+2(0){{(-1)}^{2}}\]\[+(0)(-1)\] \[=0+2+0=2.\] (iv) \[{{a}^{2}}+ab+2={{(0)}^{2}}+(0)(-1)+2\] \[=0+0+2=2\].
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