Question Factor the expression (r−1)(r4+r3+r2+r+1) Evaluate r5−1Calculate r5+r4+r3+r2+r−r4−r3−r2−r−1Rewrite the expression r×r4+r×r3+r×r2+r×r+r−r4−r3−r2−r−1Factor out r from the expression r(r4+r3+r2+r+1)−r4−r3−r2−r−1Factor out −1 from the expression r(r4+r3+r2+r+1)−(r4+r3+r2+r+1)Solution (r−1)(r4+r3+r2+r+1) Show Solution Find the roots r=1 Evaluate r5−1To find the roots of the expression,set the expression equal to 0 r5−1=0Move the constant to the right-hand side and change its sign r5=0+1Removing 0 doesn't change the value,so remove it from the expression r5=1Take the 5-th root on both sides of the equation 5r5=51Calculate r=51Solution r=1 Show Solution
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