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What 3 numbers both add and multiply together to give you a sum of 5.7?
Wiki User
∙ 14y ago
8.7
Mohamed Purdy
Wiki User
∙ 14y ago1.25 1.60 2.85 - How do you arrive at this answer?
--------------- Equation setup ---------------
A x B x C = A + B + C
--------------- Equation setup ---------------
What do I do?
1.12 1.90 2.68 - I got this by finding the average, then deviate left and right---------------- Find Average ----------------
5.7 / 3 = 1.9
--------------- Equation setup ---------------
(1.9 - n) x (1.9) x (1.9 + n) = 5.7
------------------- "F.O.I.L." -------------------
(3.61 - n2) x (1.9) = 5.7
------ Multiply parenthesis together ------
6.859 - 1.9n2 = 5.7
--------- Move 5.7 to the left side ----------
1.159 - 1.9n2 = 0
------- Move 1.9n2 to the right side -------
1.159 = 1.9n2
--------- Divide both sides by 1.9 -----------
0.61 = n2
--------------------Root both sides ------------------
n = 0.78102496759066543941297227357591
----- Plug n back into the original Function -----
(1.9 - 0.781) x (1.9) x (1.9 + 0.781) = 5.7
--------------------- Check Answer -------------------
1.12 x 1.9 x 1.68 = 5.7
1.12 x 1.9 x 1.68 = 5.7
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