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