Do you need to know what two numbers multiply to -21 and add to 16? In other words, do you need to find the two numbers whose product is -21 and sum is 16? No problem! The two numbers that multiply to -21 and add to 16 are as follows:
-1.21954
17.21954
Here is the math to prove that our above answer to "What two numbers multiply to -21 and add to 16?" is correct:
Multiply:
-1.21954 × 17.21954 ≈ -21
Add
-1.21954 + 17.21954 = 16
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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