问题 Factor the expression 2(z−4) Evaluate 2z−8解题方案 2(z−4) 显示解题方案 Find the roots z=4 Evaluate 2z−8To find the roots of the expression,set the expression equal to 0 2z−8=0Move the constant to the right-hand side and change its sign 2z=0+8Removing 0 doesn't change the value,so remove it from the expression 2z=8Divide both sides 22z=28Divide the numbers z=28解题方案 更多步骤 Evaluate 28Reduce the numbers 14Calculate 4 z=4 显示解题方案
