CAN ANYBODY PLEASE HELP I NEED HELP ASAP ILLL GIVE BRAINLIEST

Landon wrote that 3−2.6=4. which statement about his answer is true?

Precalculus question, image attached.

5. which description does not guarantee that a quadrilateral is a squar ajo is a parallelogram with perpendicular diagonals 0% has all sides congruent and all angles congruent o has all right angles and has all sides congruent 10% is both a rectangle and a rhombus 30%