Do you need to know what two numbers multiply to -21 and add to 15? In other words, do you need to find the two numbers whose product is -21 and sum is 15? No problem! The two numbers that multiply to -21 and add to 15 are as follows:
-1.2892
16.2892
Here is the math to prove that our above answer to "What two numbers multiply to -21 and add to 15?" is correct:
Multiply:
-1.2892 × 16.2892 ≈ -21
Add
-1.2892 + 16.2892 = 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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