7-4i/9i

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Solution for 7-4i/9i equation: 


i in (-oo:+oo)

7-(((4*i)/9)*i) = 0

(-4/9)*i^2+7 = 0

-4/9*i^2 = -7 // : -4/9

i^2 = 63/4

i^2 = 63/4 // ^ 1/2

abs(i) = (63/4)^(1/2)

i = (63/4)^(1/2) or i = -(63/4)^(1/2)

i in { (63/4)^(1/2), -(63/4)^(1/2) }

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