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JudyThat isn't possible; at least, not with real numbers. The extreme case is 5.5 + 5.5 = 11, and 5.5 x 5.5 = 30.25. Any other combination of numbers that add up to 11 will have a product that's even less.
If you are interested in the complex solution to this problem, you can solve this with the quadratic formula. The Wolframalpha site gives the following solution, which is pressumably the only solution:
Input: a(11-a) = 40
Solution:
a1 = (1/2)(11-i root(-39))
a2 = (1/2)(11+i root(-39))
...where "i" is the imaginary unit, and root() is my way of writing "the square root of..."
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two numbers multiply to be 8 and add to be 6?
2 and 4
What two numbers can you multiply to get 84 but add to get 20?
104
What two numbers can you multiply by each other to get 432 but can add them together to get 57?
The numbers are 4 and 13
What two numbers add up to 1 yet multiply to -156?
-155
What two numbers add to give you 18 and multiply to give you 40?
The two numbers that add to give you 18 and multiply to give you 40 are 10 and 8. This is because 10 + 8 = 18 and 10 x 8 = 80. However, if the question is referring to two numbers that add to 18 and multiply to 40, the correct pair would be 5 and 8, as 5 + 8 = 13 and 5 x 8 = 40.
