Question

3x elevado a 2 + 5x-2=0​

Answer 1

Boa noite!

3x² -5x -2 = 0

a= 3

b= -5

c= -2

∆ = b² -4.a.c

∆ = (-5)²-4.3.(-2)

∆ = 25 +24

∆ = 49

x = -b±√∆/2.a

x = -(-5)±√49/6

x' = 5+7/6

x' = 12/6

x' = 2

x"= 6-7/6

x" = -1/6

S= {-1/6,2}

abraços

Answer 2

3x²+5x-2=0

3x+5x=0+2

9x+5x=2

14x=2

x=2-14

x= -12

x=-12(±1)

x= 12