Question Simplify the expression 40−138a Evaluate 42−2−138×1×aMultiply the terms 42−2−138aSolution 40−138a Show Solution Factor the expression 2(20−69a) Evaluate 42−2−138×1×aMultiply the terms 42−2−138aSubtract the numbers 40−138aSolution 2(20−69a) Show Solution Find the roots a=6920Alternative Form a≈0.289855 Evaluate 42−2−138×1×aTo find the roots of the expression,set the expression equal to 0 42−2−138×1×a=0Multiply the terms 42−2−138a=0Subtract the numbers 40−138a=0Move the constant to the right-hand side and change its sign −138a=0−40Removing 0 doesn't change the value,so remove it from the expression −138a=−40Change the signs on both sides of the equation 138a=40Divide both sides 138138a=13840Divide the numbers a=13840Solution a=6920Alternative Form a≈0.289855 Show Solution