Question

Which equation is quadratic in form?

6(x + 2)2 + 8x + 2 + 1 = 0
6x4 + 7x2 – 3 = 0
5x6 + x4 + 12 = 0
x9 + x3 – 10 = 0

Answer 1

C (the third option)

Explanation:

the reason that C is in quadratic form is because the first exponent is a multiple of the following exponent (s)

That is the easiest way I've learned to determine if an equation is quadratic or not. Keep in mind the equation will not always be in simples form so make sure you simplify it all the way.

Hope this Helps <3

Answer 2

6(x + 2)^2 + 8x + 2 + 1 = 0

Explanation:

A quadratic equation has the variable with the highest power of 2

6(x + 2)^2 + 8x + 2 + 1 = 0 when foiled out it has the highest power of 2

6x4 + 7x2 – 3 = 0 power of 4

5x6 + x4 + 12 = 0 power of 6

x9 + x3 – 10 = 0 power of 9