Question Factor the expression 21(51−2b) Evaluate 251−bSolution 21(51−2b) Show Solution Find the roots b=251Alternative Form b=25.5 Evaluate 251−bTo find the roots of the expression,set the expression equal to 0 251−b=0Move the constant to the right-hand side and change its sign −b=0−251Removing 0 doesn't change the value,so remove it from the expression −b=−251Solution b=251Alternative Form b=25.5 Show Solution