Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Firsts
Rule quadraticequationstrategy.enter Location [1,1,0] Term "Just (TCon logic1.or [TCon relation1.eq [TCon arith1.minus [TVar \"x\",TNum 7],TCon arith1.root [TNum 8,TNum 2]],TCon relation1.eq [TCon arith1.minus [TVar \"x\",TNum 7],TCon arith1.unary_minus [TCon arith1.times [TNum 2,TCon arith1.root [TNum 2,TNum 2]]]]])" Focus "Just (TCon arith1.times [TNum 2,TCon arith1.root [TNum 2,TNum 2]])" Environment