Two numbers differ by 5. If their product is 336, the sum of the two numbers is:____________?21283751
Question
Two numbers differ by 5. If their product is 336, the sum of the two numbers is:____________?21283751
Solution
Let's denote the two numbers as x and y.
From the problem, we know that:
- x - y = 5 (the two numbers differ by 5)
- xy = 336 (their product is 336)
We need to find x + y.
First, we can express y in terms of x using the first equation: y = x - 5.
Substitute y in the second equation: x(x - 5) = 336.
This simplifies to: x^2 - 5x - 336 = 0.
This is a quadratic equation in the form ax^2 + bx + c = 0, where a = 1, b = -5, and c = -336.
We can solve this equation using the quadratic formula: x = [-b ± sqrt(b^2 - 4ac)] / (2a).
Substituting the values of a, b, and c into the formula gives: x = [5 ± sqrt((-5)^2 - 41(-336))] / (2*1).
Solving this gives two possible values for x: 21 and -16.
Since x and y are numbers that differ by 5, x cannot be -16. So, x = 21.
Substitute x = 21 into the equation y = x - 5 to find y. This gives y = 21 - 5 = 16.
Finally, the sum of the two numbers is x + y = 21 + 16 = 37.
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