If (x – 5) is a factor of f(x), which of the following must be true?
a root of f(x) is x = –5.
a root of f(x) is x = 5.
both x = –5 and x = 5 are roots of f(x).
neither x = –5 nor x = 5 is a root of f(x).

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest