Quadratics Basic ConceptVideo Completing SquareFormula: (x+y)2=x2+2.x.y+y2 (x−y)2=x2−2.x.y+y2 Example 01 Convert x2+6x+7 to the form of (x+p)2+q x2+6x+7x2+2.3.x+32−32+7Form x2+2.3.x+32=(x+3)2(x+3)2−32+7(x+3)2−9+7(x+3)2−2 Example 02 Convert x2−8x+20 to the form of (x+p)2+q x2−8x+20x2−2.4.x+42−42+20Form x2−2.4.x+42=(x−4)2(x−4)2−42+20(x−4)2−16+20(x−4)2+4 Exercise --- Member Area --- Please login to get access to the quiz (Next Lesson) Discriminant
