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18z^2+54z^2+16=0
We add all the numbers together, and all the variables
72z^2+16=0
a = 72; b = 0; c = +16;
Δ = b2-4ac
Δ = 02-4·72·16
Δ = -4608
Delta is less than zero, so there is no solution for the equation
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