Question

tìm x

 x^2+4x+4=0

Answer 1

x2+4x+4=0 =>( x+2)²  = 0

x= -2

Answer 2

x²+4x+4=0

<=>x²+2x+2x+2.2=0

<=>x.(x+2)+2.(x+2)=0

<=>(x+2)²=0<=>x+2=0<=>x=-2

vậy x=-2

Answer 3

x^2 + 4x + 4 = 0

x.x+4x=4

x(x+4)=4

=> x thuộc {1;2;4;-1;-2;-4}

Answer 4

chi dap an cua to la dung thoi

thay x vao biet lien 

Answer 5

x thuộc {1;2;4;-1;-2;-4}