Question Simplify the expression r−9 Evaluate r−7−2−0Removing 0 doesn't change the value,so remove it from the expression r−7−2Solution r−9 Show Solution Find the roots r=9 Evaluate r−7−2−0To find the roots of the expression,set the expression equal to 0 r−7−2−0=0Subtract the numbers r−9−0=0Removing 0 doesn't change the value,so remove it from the expression r−9=0Move the constant to the right-hand side and change its sign r=0+9Solution r=9 Show Solution
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