a^2 - 16 = 48
a^2 = 48 + 16
a^2 = 64
a = square root(64)
a = +8 or -8
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a2
a right triangle
Pythagorean Theorem
The reciprocal of a + bi is a - bi:1/(a + bi) since the conjugate is a - bi:= 1(a - bi)/[(a + bi)(a - bi)]= (a - bi)/[a2 - (b2)(i2)] since i2 equals to -1:= (a - bi)/(a2 + b2) since a2 + b2 = 1:= a - bi/1= a - bi
calc.exe will do the conversion for you A2(16)=162(10)