How are radical and polynomial expressions the same?

Answer by  Marina (41)

They are similer in that you still have like terms: for polynomials, like terms have the same exponent(s), for radical expression, like terms have the same "radical" For example: x^3 - 3x^2 + 5x^2 = x^3 + 2x^2 and cuberoot(x) - 3sqrt(x) +5sqrt(x) = cuberoot(x) - 8sqrt(x)

Answer by  physicsBot (18)

Both types of expressions involve real numbers raised to rational-number exponents. Polynomial expressions have positive integer exponents and are thus defined_for_all_real_numbers. Radical expressions_are_raised_to_fractional_powers(often_1/2), and_are_not_always_defined: for_example, square_roots_of_negative_numbers_are_immaginary.