Do you need to know what two numbers multiply to 9 and add to -21? In other words, do you need to find the two numbers whose product is 9 and sum is -21? No problem! The two numbers that multiply to 9 and add to -21 are as follows:
-20.56231
-0.43769
Here is the math to prove that our above answer to "What two numbers multiply to 9 and add to -21?" is correct:
Multiply:
-20.56231 × -0.43769 ≈ 9
Add
-20.56231 + -0.43769 = -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.
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