English: So, let us take let alpha be an arbitrary element in R, we know that alpha is in K right, because R is a subring of K. And hence alpha is algebraic over R, sorry algebraic over F, because K is algebraic over F that is the hypothesis, so alpha is algebraic over F. So, these from the very beginning of the field theory part of this course we know then, that F alpha is actually equal to F round bracket alpha.
Telugu: కాబట్టి, R లో ఆల్ఫా ఒక ఏకపక్ష ఎలిమెంట్(element) అని తీసుకుందాం, ఆల్ఫా K లో ఉందని మనకు తెలుసు, ఎందుకంటే R అనేది K యొక్క సబ్రింగ్(subring).