algebra

posted by .

15 can be written as the difference between two positive perfect squares:
15=4²-1²=16-1

Which of the following numbers cannot be written as the difference of two positive perfect squares?

16
17
18
19
20

  • algebra -

    These are not differences.

    17 = 4^2 + 1^2

    16 = 2^2 * 2^2

    20 = 4^2 + 2^2

    18 = 3^2 + 3^2

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Algebra

    In algebra special products and the questions says to factor the equation 200x^2-18 and I don't get how to. factor out a two, then what remains will be the difference between two perfect squares. I got as far as this 2(100x-3)^2 and …
  2. mathematics

    the difference between two positive numvers is 2 and the difference between their squares is 40. taking x to be the smaller of the two numbers, form an equation in x and solve it. thank you in advance!
  3. Algebra

    How can you determine if a polynomial is the difference of two squares?
  4. math

    The sum of two positive integers is 60 and their positive difference is 26. What is the positive difference between the squares of the two integers?
  5. ALGEBRA

    Can someone explain the following to me? 1.How do you factor the difference of two squares?
  6. math

    the sum of two positive integers is 60, and their positive difference is 26. what is the positive difference between the squares of the two integers?
  7. Math

    A Quadratic Word Problem. The difference between two positive numbers is 3. The sum of the squares of the numbers is 89. Find the numbers.
  8. Math

    Identify this polynomial as a perfect square trinomial, a difference of squares, or neither. 9a^2+9a+36 Is it difference of squares?
  9. Algebra 2

    The Sum of the squares of two positive integers is 100. The difference of the squares is 28. What is the smaller of the two numbers?
  10. algebra(difference of two squares)

    The positive difference between two consecutive odd numbers is 336. compute the larger of the two squares. But my solution was(n+1)^2-n^2=336. And. =2n+1=336. ,2n=335 where. I had n=335/2. Here igot stuck on solving the larger of the …

More Similar Questions