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Robert2907
@Robert2907
January 2020
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Aplicando a fórmula de bhaskara,resolva as seguintes equações do 2°grau: a)9x^2-12y+4=0, e b)5x^2+3x+5=0
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santos165
/\= b^2-4ac a=9 b=-12 c=4
/\=(-12)^2-4.(9).4
=144-144
/\=0
/\=0=UMA RAIZ REAL
x= -(-12)+- raiz de 0/2.9= x=12/18=2/3
/\= b2 -4 ac
/\= 3^2-4.(5).5
9-100
/\=-91
/\<0 não á raizes reais.
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/\=(-12)^2-4.(9).4
=144-144
/\=0
/\=0=UMA RAIZ REAL
x= -(-12)+- raiz de 0/2.9= x=12/18=2/3
/\= b2 -4 ac
/\= 3^2-4.(5).5
9-100
/\=-91
/\<0 não á raizes reais.