Question

3x2+5x-2=0 resolva as equaçoes

Answer 1

3x² +5x - 2 = 0

a = 3
b= 5
c = -2

Δ = b² -4 .a .c
Δ = 5² -4 .3 . (-2)
Δ = 25 + 24
Δ = 49

-b +- √Δ   /2 .a 
-5 +- √ 49    /2 . 3
-5 +- 7   / 6

x' = -5 + 7   /6
x' = 2 / 6     ÷2
x' = 1 /3

x" = -5 - 7  /6
x" = -12   /6
x" = -2

Resposta:  S: { 1/3   e  -2 }

Answer 2

3x²+5x-2=0


↓ DELTA ↓

(5)²-4.3.(-2)

25+24

∆=> √49

∆=>{7}


↓RAÍZES↓

-5±7/2.3

X'=> -5+7/2.3=> 2/6 => (1/3)


X"=> -5-7/2.3=> -12/6=> (-2)


S:. {-2 e 1/3}


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