বীজগণিতের কিছু গুরুত্বপূর্ণ সূত্রঃ
বীজগণিতের কিছু গুরুত্বপূর্ণ সূত্রঃ
1. (a+b)2 = a2+2ab+b2
2. (a-b)2 = a2-2ab+b2
3. (a+b)2 = (a-b)2 +4ab
4. (a-b)2 = (a+b)2 -4ab
5. a2-b2 = (a+b)(a-b)
6. a2+b2 = (a+b)2-2ab
7. a2-b2 = (a-b)2+2ab
8. 2(a2+b2 )= (a+b)2+(a-b)2
9. 4ab = (a+b)2-(a-b)2
11. (a+b+c)2 = a2+b2+c2+2ab+2bc+2ca
12. (a+b)3 = a3+3a2b+3ab2+b3
13. (a-b)3 = a3-3a2b+3ab2-b3
14. (a+b)3 = a3+b3+3ab(a+b)
15. (a+b)3 = a3-b3-3ab(a-b)
16. a3+b3 = (a+b)(a2-ab+b2)
17. a3-b3 = (a-b)(a2+ab+b2)
18. a3+b3 = (a+b)3-3ab(a+b)
19. a3-b3 = (a-b)3+3ab(a-b)
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| Some Important Math Equations |
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