Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Firsts
Rule algebra.equations.coverup.onevar.minus-left Location [1] Term "Just (TCon logic1.or [TCon relation1.eq [TVar \"x\",TNum 0],TCon relation1.eq [TNum 4,TCon arith1.times [TNum 2,TVar \"x\"]]])" Focus "Just (TCon relation1.eq [TNum 4,TCon arith1.times [TNum 2,TVar \"x\"]])" Environment