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Just square each component of the formula and then simplify. 4x . 8 = 64
In my head
I'm not sure why you keep labelling basic maths as "olympiad". That's the real puzzle.
Just square each component of the formula and then simplify. 4x . 8 = 64
In my head
I'm not sure why you keep labelling basic maths as "olympiad". That's the real puzzle.