Question Factor the expression (r−1)(r+1) Evaluate r2−1Rewrite the expression in exponential form r2−12Solution (r−1)(r+1) Show Solution Find the roots r1=−1,r2=1 Evaluate r2−1To find the roots of the expression,set the expression equal to 0 r2−1=0Move the constant to the right-hand side and change its sign r2=0+1Removing 0 doesn't change the value,so remove it from the expression r2=1Take the root of both sides of the equation and remember to use both positive and negative roots r=±1Simplify the expression r=±1Separate the equation into 2 possible cases r=1r=−1Solution r1=−1,r2=1 Show Solution
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