Exercise algebra.equations.quadratic.no-abc

Description
solve a quadratic equation without abc-formula

x^2-3*x-4 == 0

ready: no

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Path 1

path	[0, 4, 3, 0, 7, 10, 0, 0, 7, 12]
steps	10
major rules	3
active labels	quadraticequationstrategy