Question

3n elevado a 2 - 7 n + 2 = 0

Answer 1

Resposta:

$S=\{{1\over3},2\}$

Explicação passo-a-passo:

3n² -7n +2=0

a=3

b=-7

c=2

Δ=b²-4ac

Δ=(-7)²-4(3)(2)

Δ=49-24

Δ=25

$n={-b\pm\sqrt{\Delta} \over2a}={-(-7)\pm\sqrt{25} \over2(3)}={7\pm5\over6}\\ \\ n'={7+5\over6}={12\over6}=2\\ \\ n"={7-5\over6}={2\over6}={1\over3}$

Answer 2

vamos lá!

3n^2-7n+2=0

a=3

b=-7

C=2

∆=(-7)^2-4.(3).(2)

∆=49-24

∆=25

x'=7+√25/2.(3)

x'=7+5/6

x'=12/6

x'=2

x"=7-5/6

x"=2/6

x"=2÷2/6÷2

x""=1/3

s={1/3,2}


espero ter ajudado!

bom dia!