Needa234 Needa234

21-02-2017
Mathematics

contestada

Use a quadratic equation to find two real numbers that satisfies the situation.
The sum of the two numbers is 7 and their product is 14.

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wolf1728 wolf1728

21-02-2017

A) x + y = 7
B) x * y = 14

y = 7 -x
Inserting this into B)
B) x * (7-x) = 14
7x -x^2 = 14

-x^2 + 7x - 14 =0
Can't find the solution
Perhaps it should read the sum = 9?
Then x = 2 and y = 7

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