I need a tutorial on this

Ill mark the brainliest if you me with the these three questions 7,8,9

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

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%