Question

Resolva duas equações de 2° Grau.

a) x^2 - 6x + 6 =

b) 2x^2 - 5x - 3 =

Answer 1

x²-6x+6=0


↓DELTA↓

=>(6)²-4.1.(6)

=>36-24

=>√12

∆≈3,46


↓RAÍZES↓

-(-6)±3,46/2.1


X'=> 6+3,46/2=>9,16/2=> (4,58)


X"=> 6-3,46/2=> 2,54/2=> (1,27)


S:.( 4,58 e 1,27)



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B) 2x²-5x-3=0


↓DELTA↓

(5)²-4.2.(-3)

25+24

∆=√49

∆=(7)


↓.RAÍZES ↓

-(-5)±7/2.2

X'=> 5+7/4=> 12/4=> (3)

X"=> 5-7/4=> -2/4=>(-1/2)

S:.{ 3 e -1/2}

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boa noite, dúvidas?comente!!