) The sum of squares of two consecutive even integers is 244. Find the numbers.
Question
The sum of squares of two consecutive even integers is 244. Find the numbers.
Solution
Let's denote the two consecutive even integers as x and x+2.
The problem states that the sum of the squares of these two numbers is 244. We can write this as an equation:
x^2 + (x+2)^2 = 244
Expanding the equation gives:
x^2 + x^2 + 4x + 4 = 244
Simplifying the equation gives:
2x^2 + 4x - 240 = 0
Dividing the entire equation by 2 to simplify further gives:
x^2 + 2x - 120 = 0
This is a quadratic equation in the form ax^2 + bx + c = 0. We can solve for x using the quadratic formula x = [-b ± sqrt(b^2 - 4ac)] / (2a):
x = [-2 ± sqrt((2)^2 - 41(-120))] / (2*1) x = [-2 ± sqrt(4 + 480)] / 2 x = [-2 ± sqrt(484)] / 2 x = [-2 ± 22] / 2
This gives us two possible solutions: x = 10 or x = -12.
However, since we're looking for positive even integers, we discard x = -12.
So, the two consecutive even integers are 10 and 12.
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