the length of a spring is a linear function of the massof the object hanging from it for a particular spring the kength wad 12 centimeters when a 2-kg mass was attached to it. when a 5-kg mass was hung from it it streched to a length of 18 cm how much mass must be hung from this spring for it to strech to 25 cm​

no he doesnt because "-16' is negatiive

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

30,40,50 is correct answer