Question Factor the expression 3(2a−7) Evaluate 6a−21Solution 3(2a−7) Show Solution Find the roots a=27Alternative Form a=3.5 Evaluate 6a−21To find the roots of the expression,set the expression equal to 0 6a−21=0Move the constant to the right-hand side and change its sign 6a=0+21Removing 0 doesn't change the value,so remove it from the expression 6a=21Divide both sides 66a=621Divide the numbers a=621Solution a=27Alternative Form a=3.5 Show Solution
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