78. By what least number should we multiply the following to make it a perfect square? (a) 700 (b) 3456
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Step-by-step explanation:
(a) 700
700 × 7 = 4900
4900 is a perfect root of 70
(b) 3456
3456 × 6 = 20736
20736 is a perfect root of 144
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