Question

Which equation is quadratic in form?

Answer 1

a

Explanation:

Answer 2

A quadratic equation is written in the form
`ax^(2) + bx + c = 0`

Looking at the second, third, and fourth options, we see that the highest powers are greater than two, which automatically disqualifies them from being quadratics (since the highest power in a quadratic is 2).

This makes the first option the correct choice since the expansion of the equation gives
`2x^(2) + 28x + 61`