Iat IiserFunctionsIAT (IISER) 2020MCQ+4 / -12020 For what value of $t$ does $f(x)=x^3+t x^2+(2-t) x-3$ have only real roots? A$t=0$.B $t=4$.C $t=2$.D $t=-1$Check AnswerClear SelectionReveal AnswerShow Explanation