Math Problem Statement

the sum of the squares of three consecutive integers is 110. Find the integers

Solution

Let the three consecutive integers be represented as x1x - 1, xx, and x+1x + 1.

The sum of the squares of these integers is given as 110, so we set up the equation:

(x1)2+x2+(x+1)2=110(x - 1)^2 + x^2 + (x + 1)^2 = 110

Expanding each square term, we get:

(x1)2=x22x+1(x - 1)^2 = x^2 - 2x + 1 x2=x2x^2 = x^2 (x+1)2=x2+2x+1(x + 1)^2 = x^2 + 2x + 1

Substituting these into the equation, we have:

(x22x+1)+x2+(x2+2x+1)=110(x^2 - 2x + 1) + x^2 + (x^2 + 2x + 1) = 110

Simplify by combining like terms:

3x2+2=1103x^2 + 2 = 110

Subtract 2 from both sides:

3x2=1083x^2 = 108

Now, divide by 3:

x2=36x^2 = 36

Take the square root of both sides:

x=6orx=6x = 6 \quad \text{or} \quad x = -6

Case 1: x=6x = 6

The three consecutive integers are 55, 66, and 77.

Case 2: x=6x = -6

The three consecutive integers are 7-7, 6-6, and 5-5.

Thus, the two possible sets of integers are:

  1. 5,6,75, 6, 7
  2. 7,6,5-7, -6, -5

Would you like further details on how this was derived or have any questions?

Here are some related questions:

  1. How do you generalize finding sums of squares for any number of consecutive integers?
  2. What if we had consecutive even or odd integers instead?
  3. How does the sum of cubes of consecutive integers differ from the sum of squares?
  4. What other types of equations can result in finding consecutive integers?
  5. How does this method change if fractions are allowed?

Tip: Consecutive integer problems often lead to quadratic equations. Solving these requires familiarity with factoring and square root properties.

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Equations
Consecutive Integers

Formulas

Sum of squares: (x - 1)^2 + x^2 + (x + 1)^2
Quadratic equation: ax^2 + bx + c = 0

Theorems

Properties of quadratic equations

Suitable Grade Level

Grades 8-10