D2+1ad+25

It seems like you are trying to express a mathematical expression that involves \( d \). The expression you provided, \( d^2 + 1ad + 25 \), appears to be a quadratic equation in the variable \( d \). However, it looks like there might be a small typo with "1a" — if "a" is another variable, then it should be treated accordingly. Assuming "1a" is just a coefficient with \( a \) being a variable, your expression could be understood as: \[ d^2 + ad + 25 \] If you meant for the "1" to be part of \( a \) or if "a" is not supposed to be involved, please clarify, and I can assist accordingly. If the expression is indeed correct as is, it is a second-degree polynomial. Would you like to factor it, find its roots, or do something else with this expression?