para que (x2-5x+7)x+1=1
temos:
basta
que x^2 - 5x + 7 = 1 ....( 1 elevado a qualquer expoente � 1) -> 2
solu��es
ou
x+1 =
0 e x^2 - 5x + 7 =/= 0 -> 1 solu��o
Logo,
como as 3 solu��es s�o diferentes, ser�o 3 solu��es. (d)
[]�s
Igor
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