Do you need to know what two numbers multiply to 15 and add to -9? In other words, do you need to find the two numbers whose product is 15 and sum is -9? No problem! The two numbers that multiply to 15 and add to -9 are as follows:
-6.79129
-2.20871
Here is the math to prove that our above answer to "What two numbers multiply to 15 and add to -9?" is correct:
Multiply:
-6.79129 × -2.20871 ≈ 15
Add
-6.79129 + -2.20871 = -9
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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