Math Problem Statement

find two positive consecutive integers such that the square of first, added three times the second is 24.

Solution

Let's define the two consecutive integers as xx and x+1x + 1.

According to the problem, the square of the first integer, added to three times the second integer, equals 24. This can be expressed as the following equation:

x2+3(x+1)=24x^2 + 3(x + 1) = 24

Step 1: Expand and simplify the equation

x2+3(x+1)=24x^2 + 3(x + 1) = 24 x2+3x+3=24x^2 + 3x + 3 = 24

Step 2: Subtract 24 from both sides to set the equation equal to zero:

x2+3x+324=0x^2 + 3x + 3 - 24 = 0 x2+3x21=0x^2 + 3x - 21 = 0

Step 3: Solve the quadratic equation

We can solve this quadratic equation using the quadratic formula:

x=b±b24ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}

Here, a=1a = 1, b=3b = 3, and c=21c = -21.

Substitute these values into the quadratic formula:

x=3±324(1)(21)2(1)x = \frac{-3 \pm \sqrt{3^2 - 4(1)(-21)}}{2(1)} x=3±9+842x = \frac{-3 \pm \sqrt{9 + 84}}{2} x=3±932x = \frac{-3 \pm \sqrt{93}}{2}

Step 4: Approximate the square root

The square root of 93 is approximately 9.649.64, so:

x=3±9.642x = \frac{-3 \pm 9.64}{2}

Step 5: Solve for xx

  1. x=3+9.642=6.642=3.32x = \frac{-3 + 9.64}{2} = \frac{6.64}{2} = 3.32
  2. x=39.642=12.642=6.32x = \frac{-3 - 9.64}{2} = \frac{-12.64}{2} = -6.32

Since we are looking for positive integers, we discard these values because xx is not an integer. There is no integer solution to this quadratic equation that meets the requirements.

Thus, the problem as stated does not have a solution for positive consecutive integers.

Do you want more details or have any questions? Here are some related problems for practice:

  1. Find two consecutive integers whose product is 72.
  2. Find two positive consecutive integers such that their sum is 25.
  3. Solve x2+5x+6=0x^2 + 5x + 6 = 0.
  4. Find two consecutive odd integers whose product is 99.
  5. Find two consecutive even integers whose sum is 50.

Tip: When solving quadratic equations, always check if the discriminant is a perfect square for integer solutions.

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Equations
Consecutive Integers

Formulas

Quadratic equation formula ax^2 + bx + c = 0
General form for consecutive integers: x and x + 1

Theorems

Quadratic Formula

Suitable Grade Level

Grades 7-9