Ответ:
f(-1)=3×(-1)²+4=3+4=7
f(3)=3×3²+4=3×9+4=27+4=31
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Ответ:
f(-1)=3×(-1)²+4=3+4=7
f(3)=3×3²+4=3×9+4=27+4=31