Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Firsts
Rule navigator.down Location [0] Term "Just (TCon logic1.or [TCon relation1.eq [TVar \"x\",TNum 0],TCon relation1.eq [TCon arith1.minus [TCon arith1.times [TNum 2,TVar \"x\"],TNum 4],TNum 0]])" Focus "Just (TCon relation1.eq [TVar \"x\",TNum 0])" Environment