Question

resolva as equações abaixo

Answer 1

A) x^ - 4= 0

x^= 0+ 4

x^= 4

x= ±√4

x'= 2
x"= -2

B) x^+2x+1= 0

x^+2x+ 1^ =0

(x+1)^ = 0

x+1= 0

x=0-1

x= -1


C) x^- x -2=0

x^+ x -2x - 2= 0

x (x+1)- 2x -2= 0

x (x+1)- 2 (x+1)= 0

(x+1)•(x-2)= 0

x+1=0

x-2=0

x'= -1

x"= 2


D) 4x^ -4b= 3

-4b= 3- 4x^

b= -3/4 + x^

b= -3/4 + x^ ou x € R


E) -x^ +4x= 0

-x (x-4)= 0

-x= 0

x- 4= 0

x'= 0

x"= 4