问题 Factor the expression 3(5a−2) Evaluate 15a−6解题方案 3(5a−2) 显示解题方案 Find the roots a=52Alternative Form a=0.4 Evaluate 15a−6To find the roots of the expression,set the expression equal to 0 15a−6=0Move the constant to the right-hand side and change its sign 15a=0+6Removing 0 doesn't change the value,so remove it from the expression 15a=6Divide both sides 1515a=156Divide the numbers a=156解题方案 a=52Alternative Form a=0.4 显示解题方案
