Question

Important identities​

Answer 1

Answer:

$\purple{\boxed {Algebric . Identities}}$

Step-by-step explanation:

1) (a+b)²=a²+b²+2ab

2) (a-b)²=a²+b²-2ab

3) (a+b)(a-b)=a²-b²

4) (a+b)³=a³+b³+3a²b+3ab² 5 ) (a-b)³=a³-b³-3a²b+3ab²

6) (x+a)(x+b)=x²×(a+b)x+ab

7) (a+b+c)²=a²+b²+c²+2ab+2bc+2ca 8) a³+b³+c³-3abc=(a+b+c) (a²+b²+c²-ab-bc-ca)

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Answer 2

Answer:

$\red {QUESTION}$

Important identities.

$\green {ANSWER}$

1. (x + y)2 = x2 + y2 + 2xy
2. (x – y)2 = x2 + y2 – 2xy
3. x2 – y2 = (x + y) (x – y)
4. (x + a) (x + b) = x2 + (a + b)x + ab
5. (x + y)3 = x3 + y3 + 3xy(x + y)
6. (x – y)3 = x3 – y3 – 3xy(x – y)
7. (x + y + z)2 = x2 + y2 + z2 + 2xy + 2yz + 2zx
8. x3 + y3 + z3 – 3xyz = (x + y + z) (x2 + y2 + z2 – xy – yz – zx)

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