Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Firsts
Rule algebra.equations.coverup.onevar.minus-right Location [0] Term "Just (TCon logic1.or [TCon relation1.eq [TCon arith1.times [TNum 2,TVar \"x\"],TCon arith1.unary_minus [TNum 3]],TCon relation1.eq [TCon arith1.minus [TNum 6,TCon arith1.times [TNum 2,TVar \"x\"]],TCon arith1.unary_minus [TNum 9]]])" Focus "Just (TCon relation1.eq [TCon arith1.times [TNum 2,TVar \"x\"],TCon arith1.unary_minus [TNum 3]])" Environment Rule algebra.equations.coverup.onevar.minus-right Location [1] Term "Just (TCon logic1.or [TCon relation1.eq [TCon arith1.minus [TNum 6,TCon arith1.times [TNum 2,TVar \"x\"]],TNum 9],TCon relation1.eq [TCon arith1.times [TNum 2,TVar \"x\"],TNum 15]])" Focus "Just (TCon relation1.eq [TCon arith1.times [TNum 2,TVar \"x\"],TNum 15])" Environment