Every fourth degree equation has at least 2 real roots. True or False?

Try solving x^4 = -1.Every fourth degree equation has at least 2 real roots. True or False?
If it has one real root, then it will definitely have 2 real roots. However, it doesn't necessarily have 2 real roots to begin with. It could have 0, 2, or 4 real roots.Every fourth degree equation has at least 2 real roots. True or False?
True
False


It can have n real roots where 0 鈮?n 鈮?4