Предмет: Алгебра, автор: Аноним

упростить выражение 3(3+a^2)-(a-3)^2 при a=0,5

Ответы

Автор ответа: MrSoys

0

9+3a²-a²-9+6a=2a²+6a=2*0,25+6*0,5=0,5+3=3,5

Автор ответа: Аноним

0

9*3а²-а²+6а-9=9*3*0,5-(0,5)²+6*0,5-9=13,5-0,25+3-9=7,25

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