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Write the prime factorization of the following numbers and hence find their square roots.
(i) 7744
(ii) 9604
(iii) 5929
(iv) 7056.
To do:
We have to write the prime factorization of the given numbers and hence their square roots.
Solution:
(i) Prime factorisation of 7744 is,
$7744=2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 11 \times 11$
$=(2 \times 2 \times 2 \times 11)^2$
This implies,
$\sqrt{7744}=\sqrt{(2 \times 2 \times 2 \times 11)^2}$
$=(2 \times 2 \times 2 \times 11)$
$=88$
(ii) Prime factorisation of 9604 is,
$9604=2 \times 2 \times 7 \times7 \times 7 \times 7$
$=(2 \times 7 \times 7)^2$
This implies,
$\sqrt{9604}=\sqrt{(2 \times 7 \times 7)^2}$
$=(2 \times 7 \times 7)$
$=98$
(iii) Prime factorisation of 5929 is,
$5929=7 \times 7 \times 11 \times 11$
$=(7 \times 11)^2$
This implies,
$\sqrt{5929}=\sqrt{(7 \times 11)^2}$
$=(7 \times 11)$
$=77$
(iv) Prime factorisation of 7056 is,
$7056=2 \times 2 \times 2 \times 2\times 3 \times 3 \times 7\times7$
$=(2 \times 2 \times 3 \times 7)^2$
This implies,
$\sqrt{7056}=\sqrt{(2 \times 2\times 3\times 7)^2}$
$=(2 \times 2\times 3 \times 7)$
$=84$