Question Factor the expression 21(x−2) Evaluate 21x−1Solution 21(x−2) Show Solution Find the roots x=2 Evaluate 21x−1To find the roots of the expression,set the expression equal to 0 21x−1=0Move the constant to the right-hand side and change its sign 21x=0+1Removing 0 doesn't change the value,so remove it from the expression 21x=1Multiply by the reciprocal 21x×2=1×2Multiply x=1×2Solution x=2 Show Solution
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