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GustavoQuez
@GustavoQuez
December 2019
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Resolva a equação 5x²-3x-2=0
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Iceflow
Temos que resolver pela fórmula resolvente -b+-√b²-4ac tudo a dividir por 2a
a=5; b=-3; c=-2
5x²-3x-2=0 => x= -(-3)+-√(-3)²-4.5.(-2)/2.5 => x=3+-√9+40/10 => x=3+-√49/10 => x=3+-7/10 => x=3-7/10 ou x=3+7/10 => x=-4/10 ou x=10/10 =>
x= -4/10 ou x=1
1 votes
Thanks 1
Iceflow
-4:2=-2; 10:2=5
Iceflow
ou seja a resposta é= x= -2/5 ou x= 1
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a=5; b=-3; c=-2
5x²-3x-2=0 => x= -(-3)+-√(-3)²-4.5.(-2)/2.5 => x=3+-√9+40/10 => x=3+-√49/10 => x=3+-7/10 => x=3-7/10 ou x=3+7/10 => x=-4/10 ou x=10/10 =>
x= -4/10 ou x=1