Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Firsts
Rule quadraticequationstrategy.enter Location [1] Term "Just (TCon relation1.eq [TCon arith1.times [TNum 4,TVar \"x\"],TCon arith1.minus [TCon arith1.plus [TCon arith1.power [TVar \"x\",TNum 2],TCon arith1.times [TNum 4,TVar \"x\"]],TNum 12]])" Focus "Just (TCon arith1.minus [TCon arith1.plus [TCon arith1.power [TVar \"x\",TNum 2],TCon arith1.times [TNum 4,TVar \"x\"]],TNum 12])" Environment