Question

Show that x = -3 is solution of equation x
^2
+ 6x + 9 = 0.​

Answer 1

Answer:

-3^2+6*(-3)+9

9-18+9

18-18=0

the answer is 0 so -3 is the solution of the given equation

Answer 2

Step-by-step explanation:

Using the formula as instructed.

Compare to: ax^2+bx+c -> x=(-b+-sqrt(b^2-4ac))/(2a)

In this case: a=1; b=-6 and c=9 giving:

x=(+6+-sqrt((-6)^2-4(1)(9)))/(2(1))

x=(6+-sqrt(36-36))/2

x=3+-0

x=3

Hope it was helpful.