Factor: x2 + 25 Use the Binomial Theorem and Pascal's triangle to expand (x + 2)4. Given the function. f(x) = x3 5x2 + 9x 45, determine the number of roots and identify them. Explain the closure property as it relates to rational expressions. Give an example and simplify it to prove closure. \f\f\fx +1 x+2 After 2 3X have been combined using the least common denominator of 6x, what is the numerator? O a -x2 + 4x + 2 Ob 3 x 2 + x - 2 O c -3x2 - 4x + 2 Od 1 3x2 + X - 4\f\f\f\f\f\f\f\f\f\f