Question Factor the expression 4(7−100z) Evaluate 28−400zSolution 4(7−100z) Show Solution Find the roots z=1007Alternative Form z=0.07 Evaluate 28−400zTo find the roots of the expression,set the expression equal to 0 28−400z=0Move the constant to the right-hand side and change its sign −400z=0−28Removing 0 doesn't change the value,so remove it from the expression −400z=−28Change the signs on both sides of the equation 400z=28Divide both sides 400400z=40028Divide the numbers z=40028Solution z=1007Alternative Form z=0.07 Show Solution
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