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There is a mathematical trick for those people who are most knows the math.... 2+2=5
-20 = -20
Further we will add 20 1/4 to both members of equation
all know these mathematical formulas 1) a=4 b=9/2 2) a=5 b=9/2
all know these mathematical formulas
both parts are positive, it is possible to take a square root
as was to be shown
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