Do you need to know what two numbers multiply to -18 and add to -21? In other words, do you need to find the two numbers whose product is -18 and sum is -21? No problem! The two numbers that multiply to -18 and add to -21 are as follows:
-21.82475
0.82475
Here is the math to prove that our above answer to "What two numbers multiply to -18 and add to -21?" is correct:
Multiply:
-21.82475 × 0.82475 ≈ -18
Add
-21.82475 + 0.82475 = -21
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: