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What are the solutions of the equation z2-12z+36=0

What are the solutions of the equation z2-12z+36=0-example-1
User Lycha
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z^2 - 12z + 36 = 0
(z - 6)(z - 6) = 0

z - 6 = 0
z = 6

solution is : 6,6
User Nanji Mange
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