Question

using the prime factorisation method,find which of the following numbers are not perfect square:1)768 2)1296​

Answer 1

767 is not perfect square

Step-by-step explanation:

1) 768 = 2× 2 ×2 × 2 ×2×2 ×2×2×3

2) 1296 = 2×2×2×2×9×9

Answer 2

Answer:

1)768

By Prime factorization we get

768=4×4×4×4×3=(4²×4²×3).

Thus, 768 cannot be expressed as a product of pairs of equal factors.

Hence, 768 is not a perfect square.

2)1296

By Prime factorization we get

1296=4×4×9×9

Thus,1296 can be expressed as a product of pairs of equal factors.

Therefore, 1296 is a perfect square.

Step-by-step explanation:

Hope it helps.....