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 [TCon arith1.root [TNum 7,TNum 2],TCon arith1.plus [TNum 7,TCon arith1.times [TNum 2,TVar \"x\"]]],TCon relation1.eq [TCon arith1.unary_minus [TCon arith1.root [TNum 7,TNum 2]],TCon arith1.plus [TNum 7,TCon arith1.times [TNum 2,TVar \"x\"]]]])" Focus "Just (TCon logic1.or [TCon relation1.eq [TCon arith1.root [TNum 7,TNum 2],TCon arith1.plus [TNum 7,TCon arith1.times [TNum 2,TVar \"x\"]]],TCon relation1.eq [TCon arith1.unary_minus [TCon arith1.root [TNum 7,TNum 2]],TCon arith1.plus [TNum 7,TCon arith1.times [TNum 2,TVar \"x\"]]]])" Environment