Question

resolva as equações
A- x2-5×+4=5
B- x2-4×+5=0
C- 2x2+6×+4=0
D- 2x2+4×+3=0

Answer 1

Resposta:

a)x-5x=5-2+4

-4x= 3+4

x= 7/-4

x= -1,75

b)x-4x=0-2-5

-3x=-7

x= -7/-3

x=2,33

c)2x+6x=0-2-4

8x= -6

x= -6/8

x=-0,75

d)2x+4x=0-2+3

6x=-2+3

x=0,16

x=1/6