Question Factor the expression 21(x−12) Evaluate 21x−6Solution 21(x−12) Show Solution Find the roots x=12 Evaluate 21x−6To find the roots of the expression,set the expression equal to 0 21x−6=0Move the constant to the right-hand side and change its sign 21x=0+6Removing 0 doesn't change the value,so remove it from the expression 21x=6Multiply by the reciprocal 21x×2=6×2Multiply x=6×2Solution x=12 Show Solution
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