Question Simplify the expression 2,1−a Evaluate (2,1−a)Solution 2,1−a Show Solution Factor the expression 101(21−10a) Evaluate (2.1−a)Remove the parentheses 2.1−aConvert the decimal into a fraction 1021−aSolution 101(21−10a) Show Solution Find the roots a=2.1Calculate a=2,1 Evaluate (2,1−a)To find the roots of the expression,set the expression equal to 0 2,1−a=0Solution More Steps Evaluate 2.1−a=0Move the constant to the right-hand side and change its sign −a=0−2.1Removing 0 doesn't change the value,so remove it from the expression −a=−2.1Change the signs on both sides of the equation a=2.1 a=2.1Calculate a=2,1 Show Solution