Where is Afghanistan? GDP of Afghanistan; What is the Capital of Afghanistan? List of Airports in Afghanistan
Definition of expression for Students. 1  1 : the act or process of making known especially in words. 2  2 : a meaningful word or saying Grandpa uses old-fashioned expressions. 3  3 : the look on someone's face She had a pleased expression. 4  4 : a way of speaking, singing, or playing that shows mood or feeling She read her lines with expression.
Rational Expressions. A rational expression, also known as a rational function, is any expression or function which includes a polynomial in its numerator and denominator. In other words, a rational expression is one which contains fractions of polynomials.