Question

Which equation is quadratic in form?

2(x + 5)^2 + 8x + 5 + 6 = 0
x^6 + 6x^4 + 8 = 0
7x^6 + 36x^3 + 5 = 0
4x^9 + 20x^3 + 25 = 0

Answer 1

C: 7x^6 + 36x^3 + 5 = 0

Explanation:

on edg 2020

Answer 2

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.