Answer:
The quadratic equation [tex]x^{2} + 6x + 9 = 0[/tex] would have a value of x = + 3 (twice)
Step-by-step explanation:
If x = ± 3. then x = +3 or x = -3
The quadratic equation would be:
(x + 3) (x +3) = 0
[tex]x^{2} - 9 = 0[/tex]
For x ≠ -3, the equation would be:
[tex]x^{2} + 6x + 9 = 0[/tex], where x = + 3 (twice).
Answer:
The growth rate of a tree
Step-by-step explanation:
Here, we are asked in what situation when solving a quadratic equation and our answers are -3 and 3 in which -3 would mot be a possible solution.
Where the quadratic equation of which the solution is -3 pertains to items which only have positive values, such as "the number of persons" or "things" or the "time duration" of an event, then the -3 would not be a possible solution.
Example, a function of time, such as velocity, with a solution of
(x-3)(x+3) then the -3 will not be a possible solution.
Another example is the growth rate of a tree given by
(t-3)(t+3) = 0.
