Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Firsts
Rule algebra.equations.coverup.power Location [] Term "Just (TCon logic1.or [TCon relation1.eq [TNum 9,TCon arith1.minus [TNum 6,TCon arith1.times [TNum 2,TVar \"x\"]]],TCon relation1.eq [TCon arith1.unary_minus [TNum 9],TCon arith1.minus [TNum 6,TCon arith1.times [TNum 2,TVar \"x\"]]]])" Focus "Just (TCon logic1.or [TCon relation1.eq [TNum 9,TCon arith1.minus [TNum 6,TCon arith1.times [TNum 2,TVar \"x\"]]],TCon relation1.eq [TCon arith1.unary_minus [TNum 9],TCon arith1.minus [TNum 6,TCon arith1.times [TNum 2,TVar \"x\"]]]])" Environment