Is x^3+8x^4-15x+14x^-20 a polynomial

^ means squared

Consider the expression below. 9 + 4(x + 2) – 3.1 select the term that best describes "3" in the given expression. o a. coefficient variable exponent constant

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression

Is a positive integer raised to a negative power always positive