Question

1. Coloque na forma ax2 + bx + c = 0 as seguintes equações do 2º grau e determine a, be c
c) x.(2x-3) = 4x -1
d) 4x.(x+3) +9 = 0
e) x.(x-2) +1 = 2.(x+3)
f) x.(x-2) = 3.(x+6)
( preciso do passo a passo)

Answer 1

c) x.(2x - 3) = 4x - 1

2x² - 3x = 4x - 1

2x² - 3x - 4x + 1

2x² - 7x + 1 = 0

a = 2

b = - 7

c = 1

d) 4x.(x + 3) + 9 = 0

4x² + 12x + 9 = 0

a = 4

b = 12

c = 9

e) x.(x - 2) + 1 = 2.(x + 3)

x² - 2x + 1 = 2x + 6

x² - 2x - 2x + 1 - 6

x² - 4x - 5 = 0

a = 1

b = - 4

c = - 5

f) x.(x - 2) = 3.(x + 6)

x² - 2x = 3x + 18

x² - 2x - 3x - 18

x² - 5x - 18 = 0

a = 1

b = - 5

c = - 18

Answer 2

Resposta:

c) x.(2x-3) = 4x -1

2x^2-3x-4x+1=0

2x^2-7x+1=0

a=2

b=-7

c=1

d) 4x.(x+3) +9 = 0

4x^2+12x+9=0

a=4

b=12

c=9

e) x.(x-2) +1 = 2.(x+3)

x^2-2x+1=2x+6

x^2-2x-2x+1-6=0

x^2 -4x-5=0

a=1

b=-4

c=-5

f) x.(x-2) = 3.(x+6)

x^2-2x=3x+18

x^2-2x-3x-18=0

x^2-5x-18=0

a=1

b=-5

c=-18