Apply the formula: $a+b$$=a+b$, where $a=-121$, $b=-621$ and $a+b=-121-621$
Try other ways to solve this exercise
Get a preview of step-by-step solutions.
Earn solution credits, which you can redeem for complete step-by-step solutions.
Save your favorite problems.
Become premium to access unlimited solutions, download solutions, discounts and more!