Question Factor the expression 10(7−20z) Evaluate 70−200zSolution 10(7−20z) Show Solution Find the roots z=207Alternative Form z=0.35 Evaluate 70−200zTo find the roots of the expression,set the expression equal to 0 70−200z=0Move the constant to the right-hand side and change its sign −200z=0−70Removing 0 doesn't change the value,so remove it from the expression −200z=−70Change the signs on both sides of the equation 200z=70Divide both sides 200200z=20070Divide the numbers z=20070Solution z=207Alternative Form z=0.35 Show Solution