Do you need to know what two numbers multiply to 21 and add to 81? In other words, do you need to find the two numbers whose product is 21 and sum is 81? No problem! The two numbers that multiply to 21 and add to 81 are as follows:
0.26009
80.73991
Here is the math to prove that our above answer to "What two numbers multiply to 21 and add to 81?" is correct:
Multiply:
0.26009 × 80.73991 ≈ 21
Add
0.26009 + 80.73991 = 81
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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