Question Factor the expression (r−1)(r2+r+1) Evaluate r3−1Rewrite the expression in exponential form r3−13Use a3−b3=(a−b)(a2+ab+b2) to factor the expression (r−1)(r2+r×1+12)Any expression multiplied by 1 remains the same (r−1)(r2+r+12)Solution (r−1)(r2+r+1) Show Solution Find the roots r=1 Evaluate r3−1To find the roots of the expression,set the expression equal to 0 r3−1=0Move the constant to the right-hand side and change its sign r3=0+1Removing 0 doesn't change the value,so remove it from the expression r3=1Take the 3-th root on both sides of the equation 3r3=31Calculate r=31Solution r=1 Show Solution
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