Question Simplify the expression 4−z Evaluate 74−z−0−0−70Removing 0 doesn't change the value,so remove it from the expression 74−z−70Solution 4−z Show Solution Find the roots z=4 Evaluate 74−z−0−0−70To find the roots of the expression,set the expression equal to 0 74−z−0−0−70=0Removing 0 doesn't change the value,so remove it from the expression 74−z−0−70=0Removing 0 doesn't change the value,so remove it from the expression 74−z−70=0Subtract the numbers 4−z=0Move the constant to the right-hand side and change its sign −z=0−4Removing 0 doesn't change the value,so remove it from the expression −z=−4Solution z=4 Show Solution