Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Firsts
Rule algebra.equations.coverup.times Location [] Term "Just (TCon relation1.eq [TCon arith1.unary_minus [TNum 2],TVar \"x\"])" Focus "Just (TCon relation1.eq [TCon arith1.unary_minus [TNum 2],TVar \"x\"])" Environment Rule algebra.equations.coverup.negate Location [] Term "Just (TCon relation1.eq [TCon arith1.unary_minus [TNum 40],TCon arith1.times [TNum 20,TVar \"x\"]])" Focus "Just (TCon relation1.eq [TCon arith1.unary_minus [TNum 40],TCon arith1.times [TNum 20,TVar \"x\"]])" Environment