Do you need to know what two numbers multiply to -128 and add to -15? In other words, do you need to find the two numbers whose product is -128 and sum is -15? No problem! The two numbers that multiply to -128 and add to -15 are as follows:
-21.07387
6.07387
Here is the math to prove that our above answer to "What two numbers multiply to -128 and add to -15?" is correct:
Multiply:
-21.07387 × 6.07387 ≈ -128
Add
-21.07387 + 6.07387 = -15
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.
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