(a-b) (a+b) of STD 8
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Step-by-step explanation:
(a-b)(a+b)
a²-b²
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Step-by-step explanation:
1. a2 – b2 = (a – b)(a + b)
2. (a + b)2 = a2 + 2ab + b2
3. a2 + b2 = (a + b)2 – 2ab
4. (a – b)2 = a2 – 2ab + b2
5. (a + b)3 = a3 + b3 + 3ab(a + b)
6. (a – b)3 = a3 – b3 – 3ab(a – b)
7. a3 – b3 = (a – b)(a2 + ab + b2)
8. a3 + b3 = (a + b)(a2 – ab + b2)
9. x(a + b) = xa + xb
10. x(a – b) = xa – xb
11. (x – a)(x – b) = x2 – (a + b)x + ab
12. (x – a)(x + b) = x2 + (b – a)x – ab
13. (x + a)(x – b)= x2 + (a – b)x –ab
14. (x + a)(x + b)= x2 + (a + b)x + ab
15. (x + y + z)2 = x2 + y2 + z2 + 2xy + 2yz + 2zx
16. (x – y – z)2 = x2 + y2 + z2 – 2xy + 2yz – 2zx
ALL ALGERRIC FORMULLAS
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