A quadratic equation refers to an equation with the highest degree of 2. The first equation, 2(x+5)^2 + 8x + 5 + 6 = 0 is the only one with the highest degree of 2 (in (x+5)^2), so that is the quadratic.
Answer:
C: 7x^6 + 36x^3 + 5 = 0
Step-by-step explanation:
on edg 2020
