Resposta:
[tex]a) 2x^2-5x+2=0\\b)x^2+4x-3=0 \\c)y^2-8y=0\\ d)-5x^2-30x-40=0 \\e)3x^2-7x+1=0\\f)x^2-5x=0\\[/tex]
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Resposta:
[tex]a) 2x^2-5x+2=0\\b)x^2+4x-3=0 \\c)y^2-8y=0\\ d)-5x^2-30x-40=0 \\e)3x^2-7x+1=0\\f)x^2-5x=0\\[/tex]