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.plus [TCon arith1.plus [TNum 9,TCon arith1.times [TNum 12,TVar \"x\"]],TCon arith1.times [TNum 4,TCon arith1.power [TVar \"x\",TNum 2]]],TCon arith1.minus [TCon arith1.times [TNum 3,TCon arith1.power [TVar \"x\",TNum 2]],TNum 11]])" Focus "Just (TCon relation1.eq [TCon arith1.plus [TCon arith1.plus [TNum 9,TCon arith1.times [TNum 12,TVar \"x\"]],TCon arith1.times [TNum 4,TCon arith1.power [TVar \"x\",TNum 2]]],TCon arith1.minus [TCon arith1.times [TNum 3,TCon arith1.power [TVar \"x\",TNum 2]],TNum 11]])" Environment