Do you need to know what two numbers multiply to -99 and add to 90? In other words, do you need to find the two numbers whose product is -99 and sum is 90? No problem! The two numbers that multiply to -99 and add to 90 are as follows:
-1.08687
91.08687
Here is the math to prove that our above answer to "What two numbers multiply to -99 and add to 90?" is correct:
Multiply:
-1.08687 × 91.08687 ≈ -99
Add
-1.08687 + 91.08687 = 90
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: