Question

class9 NCERT
List out all the mathematical formula from
Mathematic text book Actual you proving
for proving x²–y² = (x+y) (x-y)​

Answer 1

Step-by-step explanation:

1. (a+b)²= a²+2ab+b²
2. (a-b)²=a²-2ab+b²
3. (a²-b²)=(a-b)(a+b)
4. (a-b)³=a³-3a²b+3ab²-b³
5. (a+b)³=a³+3a²b+3ab²+b³
6. (a+b+c)²=a²+b²+c²+2ab+2bc+2ca
7. a³+b³+c³-3abc=(a+b+c)(a²+b²+c²-ab-bc-ca)
8. (x+a)(x+b)=x²+(a+b)x+ab

hope this helps you dear friend!!