Question Simplify the expression 30−a Evaluate 130−aSolution 30−a Show Solution Find the roots a=30 Evaluate 130−aTo find the roots of the expression,set the expression equal to 0 130−a=0Divide the terms 30−a=0Move the constant to the right-hand side and change its sign −a=0−30Removing 0 doesn't change the value,so remove it from the expression −a=−30Solution a=30 Show Solution