Question Factor the expression 21(25−2d) Evaluate 225−dSolution 21(25−2d) Show Solution Find the roots d=225Alternative Form d=12.5 Evaluate 225−dTo find the roots of the expression,set the expression equal to 0 225−d=0Move the constant to the right-hand side and change its sign −d=0−225Removing 0 doesn't change the value,so remove it from the expression −d=−225Solution d=225Alternative Form d=12.5 Show Solution