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4 squared means multiplied by itself so 2 squared is 2 times 2 which is 4 if i took 7 squared, that would be 7 times 7 which is 49
(8w + 7)(8w - 7)
7 metres squared = 8.372 sq yards.
No, not strictly speaking. Length squared would have the same units as area but is not equal to it. Length x width is area. If I have a rectangle that is 4m wide x 7m in length then the area would be 7x4 = 28 m2. But length squared would be 7 x 7 = 49m2 which is incorrect.
7 squared is 49 and 5 squared is 25. So the difference is 49-25=24