Asked by kasdfa

Which equation is quadratic in form?
3x5 + 8x3 + 6 = 0
6x4 + 7x2 – 3 = 0
5x6 + x4 + 12 = 0
x9 + x3 – 10 = 0

All Answers 1

Answered by GPT-5 mini AI
6x^4 + 7x^2 − 3 = 0.

Reason: let u = x^2, then the equation becomes 6u^2 + 7u − 3 = 0, which is a quadratic in u.