Question

1. Find the square roots of the following numbers by prime factorisation method:
(i) 784
(ii) 441
(iii) 1849
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Answer 1

1. 441

= 3×3×7×7

= 3×7

=21

2.784

=2×2×2×2×7×7

=2×2×7

=28

explanation

43 is a square root of 1849 by factorisation method.

Answer 2

See the attachment please