Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Firsts
Rule topform.enter Location [] Term "Just (TCon relation1.eq [TCon arith1.times [TNum 3,TVar \"x\"],TCon arith1.times [TCon arith1.minus [TNum 4,TVar \"x\"],TCon arith1.minus [TNum 1,TVar \"x\"]]])" Focus "Just (TCon relation1.eq [TCon arith1.times [TNum 3,TVar \"x\"],TCon arith1.times [TCon arith1.minus [TNum 4,TVar \"x\"],TCon arith1.minus [TNum 1,TVar \"x\"]]])" Environment