Question Factor the expression 21(x−10) Evaluate 21x−5Solution 21(x−10) Show Solution Find the roots x=10 Evaluate 21x−5To find the roots of the expression,set the expression equal to 0 21x−5=0Move the constant to the right-hand side and change its sign 21x=0+5Removing 0 doesn't change the value,so remove it from the expression 21x=5Multiply by the reciprocal 21x×2=5×2Multiply x=5×2Solution x=10 Show Solution
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