Question

Which of the following equations has only one solution?

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

Answer 1

do you mean one UNIQUE solution?

Answer 2

because if it's just "one solution" then it should be none of the above because:

linear equation = one solution

quadratic equation = two solutiions

cubic equation = three solutions

and so on...

and all of these are quadratic equations...

Answer 3

anyway....factor out the equations and tell me what you got

Answer 4

fjx^2+ 4x + 4 = 0

Answer 5

x^2+ 4x + 4 = 0

Answer 6

so factor that..

Answer 7

x^2+4x+4=0
(x+2)^2=0
=-2?

Answer 8

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

Answer 9

x^2- 1 = 0
x^2-1=0
x^2=1
x=-1? 1?

Answer 10

all are correct

so which one has 1 solution?

Answer 11

x^2+4x+4=0 :)

Answer 12

right