Power Point Presentation

1. POWER POINT PRESENTATION

2. WELCOME

3. Name of College : New B.EdCollege NellimoodName of Student : GeethuU ROption : MathematicsReg. No : 180/13376004

4. Topic : IDENTITIESStandard : VIIISubject : Mathematics

5. IDENTITIES
Anidentityisanequalitybetweenfunctionsthataredifferentlydefined

6. Expansion of (x‐y)2What is the Expansion of(x‐y)2 ?

7. What is the area of a square having side ‘x’ ?

8. Area = x2

9. What is the area of the square having side ‘x’ decreased by ‘y’ unit?

10. Area = (x‐y)2
New Figure is
Now the side is (x‐y)

11. HereArea of Large Square= x2 Area of Small Square = (x‐y)2

12. If the remaining portion are divided into two rectangles, then the figure is

13. Therefore, Area of the remaining portion
= xy+y(x‐y)
= xy+yx‐y2
= 2xy‐y2

14. Then the large square’s area is
X2=(x‐y)2+2xy‐y2
Therefore,
(x‐y)2=x2+y2‐2xy

15. If x, y be any number, then we get
(x‐y)2 = x2+y2‐2xy

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