Answer:
± 7
Explanation:
Given
d = , then
d = 7 or - 7, that is ± 7
Since 7 × 7 = 49 and - 7 × - 7 = 49
7 is the square root of 49
we can find it by using lcm method
or
we know 7*7 is 49
so
49/7 - 7
therefore square root of 49 - 7
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