What is the solution to this equation?
x+9 = -4
O
O A. x=-5
O B. x= 5
C. x= 13
O D. x= -13
O

Step-by-step explanation:

You would plugin the x value into the equation which would look something like.

-13+9=-4

which when you simplify you get

-4=-4

Which is true so D is correct

yes

step-by-step explanation:

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0