Question Simplify the expression a−2011 Evaluate a−1991−20Solution a−2011 Show Solution Find the roots a=2011 Evaluate a−1991−20To find the roots of the expression,set the expression equal to 0 a−1991−20=0Subtract the numbers a−2011=0Move the constant to the right-hand side and change its sign a=0+2011Solution a=2011 Show Solution
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