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Aubrey is older than chase. Their ages are consecutive integers. Find Aubrey’s age if the product of their ages is 56.

User Sotto
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2 Answers

12 votes
12 votes

Answer:

Chase is 7 and Aubrey is 8

Explanation:

Let x = Chase's age

Let x + 1 = Aubrey's age

x(x + 1) = 56


x^(2) + x = 56

(x + 8) (x -7)

Chase is 7 and Aubrey is 8

User Ptrn
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3.0k points
13 votes
13 votes
Let's call Aubrey's age x and Chase's age y.
Since the ages are consecutive integers, y = x - 1.
Since the product of their ages is 56, x * y = x * (x - 1) = 56.
Expanding the right side of the equation gives x^2 - x = 56.
Adding x to both sides of the equation gives x^2 = x + 56.
Subtracting 56 from both sides of the equation gives x^2 - x - 56 = 0.
This is a quadratic equation, and it can be solved using the quadratic formula:

x = (-b +/- sqrt(b^2 - 4ac)) / 2a

Where a, b, and c are the coefficients of the quadratic equation:
a = 1, b = -1, c = -56

Plugging these values into the formula gives:

x = (1 +/- sqrt(1^2 - 41(-56))) / 2*1
= (1 +/- sqrt(1 + 224)) / 2
= (1 +/- 15) / 2

The two solutions of the equation are x = -14 and x = 8.
Since Aubrey's age must be positive, Aubrey's age is x = 8.
Therefore, Aubrey is 8 years old and Chase is 7 years old.
User Gsagrawal
by
3.3k points
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