Olá, preciso de uma ajudinha pra fazer algumas contas, valendo 100 pontos. No maximo ate amanha preciso das respostas, contas completas
1) 2x²-7x-15=0
2) 4x²-12x+9=0
3) x²- x-12=0
4)2x²+12x+18=0
5)x²-4x+9=0
6)25x²-20x-4=0
7)x²-2x-15=0
8)x²+3x+2=0
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