Question

3 Encontre as raízes das equações. ( Resolva no caderno )
a) 3x2 + 5x + 4 = 0
g) x? -5x + 6 = 0
c) 2x2 - 4x + 2 = 0
h) x2 - 5x + 8 = 0
b) 3x + 6x + 4 = 0
d) x2 + 3x + 2 =0
e)x² - 7x + 10 = 0
f x² - 4x + 3 = 0

ajuda aí gente por favor​

Answer 1

Resposta:

a)3x2 + 5x + 4 = 0

6x+5x+4=0

11x+4=0

11x=-4

x=-4/11

g) x? -5x + 6 = 0

-4x+6=0

-4x=-6

x=3/2

c) 2x² - 4x + 2 = 0

(x-1)²=0

x-1=0

x=1

h) x2 - 5x + 8 = 0

2x-5x+8=0

-3x+8=0

-3x=-8

x=8/3

b) 3x + 6x + 4 = 0

9x+4=0

9x=-4

x=4/9

d) x2 + 3x + 2 =0

2x+3x+2=0

5x+2=0

5x=-2

x=2/5

e)x² - 7x + 10 = 0

x²-2x-5x+10=0

x.(x-2)-5(x-2)=0

(x-2)×(x-5)=0

x-2=0

x-5=0

x=2

x=5

x1=2 x2=5

f) x² - 4x + 3 = 0

x²-x-3x+3=0

x.(x-1).(x-3)=0

(x-1).(x-3)=0

x-1=0

x-3=0

x=1

x=3

x1=1 x2=3

usa esse aplicativo de matemática

nome:photo-math