Compare the given dimensions of four triangles. Which triangle is possible to construct?
A-side lengths of 5 ft, 12 ft, and 13 ft
B-side lengths of 2 ft, 11 ft, and 15 ft
C-side lengths of 3 ft, 7 ft, and 11 ft
C-side lengths of 4 ft, 8 ft, and 15 ft

step-by-step explanation:

the answer is 128

b

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