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Q: What 2 numbers add to equal 21 but multiply to equal 72?

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Related questions

The numbers are: 21 and -10

-21, 27

93

-1

99

141

21

21

-17

21

57

20 + 1

51

28 and -7

7 x 3

The numbers are: -1 and -20

341

-3367

41

111

-4 and -17

7 & 3

If you've written that correctly, there aren't two whole numbers that satisfy those conditions. -20 and -5 add to -25, but multiply to 100. -25 and 4 multiply to -100, but add to -21.

Unfortuanately, you can't factor this polynomial. To do so, you must find a pair of numbers that add up to the coefficient of the middle term, and multiply to equal the product of the coefficients of the first and last terms. In other words, we want a pair of numbers that add up to make -11, and multiply to make 21. Unfortunately there are no natural numbers that meet that condition.

111