Question Factor the expression 2(43−21z) Evaluate 86−42zSolution 2(43−21z) Show Solution Find the roots z=2143Alternative Form z=2.0˙47619˙ Evaluate 86−42zTo find the roots of the expression,set the expression equal to 0 86−42z=0Move the constant to the right-hand side and change its sign −42z=0−86Removing 0 doesn't change the value,so remove it from the expression −42z=−86Change the signs on both sides of the equation 42z=86Divide both sides 4242z=4286Divide the numbers z=4286Solution z=2143Alternative Form z=2.0˙47619˙ Show Solution
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