Question Simplify the expression 7−a Evaluate 821−814−aSolution 7−a Show Solution Find the roots a=7 Evaluate 821−814−aTo find the roots of the expression,set the expression equal to 0 821−814−a=0Subtract the numbers 7−a=0Move the constant to the right-hand side and change its sign −a=0−7Removing 0 doesn't change the value,so remove it from the expression −a=−7Solution a=7 Show Solution
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