The sum of the squares two consecutive intergers is 45 . What are the intergers

1 answer

Let's denote the two consecutive integers as \( n \) and \( n + 1 \). The equation based on the problem's statement is:

\[ n^2 + (n + 1)^2 = 45 \]

Now, expand the equation:

\[ n^2 + (n^2 + 2n + 1) = 45 \]

Combine like terms:

\[ 2n^2 + 2n + 1 = 45 \]

Subtract 45 from both sides:

\[ 2n^2 + 2n + 1 - 45 = 0 \]

This simplifies to:

\[ 2n^2 + 2n - 44 = 0 \]

Now, divide the entire equation by 2:

\[ n^2 + n - 22 = 0 \]

Next, we can factor this quadratic equation (or use the quadratic formula). We need two numbers that multiply to \( -22 \) and add to \( 1 \). The numbers \( 11 \) and \( -2 \) fit, so we can factor it as:

\[ (n + 11)(n - 2) = 0 \]

Setting each factor equal to zero gives us the possible solutions for \( n \):

\[ n + 11 = 0 \quad \Rightarrow \quad n = -11 \]

\[ n - 2 = 0 \quad \Rightarrow \quad n = 2 \]

Thus, the pairs of consecutive integers are:

  1. For \( n = -11 \): The integers are \( -11 \) and \( -10 \).
  2. For \( n = 2 \): The integers are \( 2 \) and \( 3 \).

Therefore, the consecutive integers that satisfy the equation are \( (-11, -10) \) and \( (2, 3) \).