Question Simplify the expression 90a Evaluate 90a−0×aAny expression multiplied by 0 equals 0 90a−0Solution 90a Show Solution Find the roots a=0 Evaluate 90a−0×aTo find the roots of the expression,set the expression equal to 0 90a−0×a=0Any expression multiplied by 0 equals 0 90a−0=0Removing 0 doesn't change the value,so remove it from the expression 90a=0Solution a=0 Show Solution