Question Factor the expression 2(21−40d) Evaluate 42−80dSolution 2(21−40d) Show Solution Find the roots d=4021Alternative Form d=0.525 Evaluate 42−80dTo find the roots of the expression,set the expression equal to 0 42−80d=0Move the constant to the right-hand side and change its sign −80d=0−42Removing 0 doesn't change the value,so remove it from the expression −80d=−42Change the signs on both sides of the equation 80d=42Divide both sides 8080d=8042Divide the numbers d=8042Solution d=4021Alternative Form d=0.525 Show Solution
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