Answer:The expression 5 + 9 - 2dxy² cannot be simplified further without knowing the values of d, x, and y. Here's why: - Constants: 5 and 9 are constants, their values remain the same.- Variables: d, x, and y are variables, their values can change.- Multiplication: The term -2dxy² involves multiplication of variables. We need the values of d, x, and y to calculate this term. Therefore, the simplified expression is: 5 + 9 - 2dxy² = 14 - 2dxy² To get a numerical answer, you need to substitute the values of d, x, and y.