Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Firsts
Rule constantform.enter Location [] Term "Just (TCon relation1.eq [TNum 20,TCon arith1.unary_minus [TCon arith1.times [TNum 10,TVar \"x\"]]])" Focus "Just (TCon relation1.eq [TNum 20,TCon arith1.unary_minus [TCon arith1.times [TNum 10,TVar \"x\"]]])" Environment