Do you need to know what two numbers multiply to 128 and add to -80? In other words, do you need to find the two numbers whose product is 128 and sum is -80? No problem! The two numbers that multiply to 128 and add to -80 are as follows:
-78.36665
-1.63335
Here is the math to prove that our above answer to "What two numbers multiply to 128 and add to -80?" is correct:
Multiply:
-78.36665 × -1.63335 ≈ 128
Add
-78.36665 + -1.63335 = -80
The answers above are rounded if necessary. Therefore, if you double check that the answer above is correct by using a calculator, you may find it to be slightly off.
Multiply Add Calculator
Need another answer? Submit another set of values below: