Class~~9th....
Q_tell me some algebraic identities according to class 9th...
❌no irrelevant answers ❌
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Answered by
2
Answer:
(a + b)2 = a2 + 2ab + b. ...
(a – b)2 = a2 – 2ab + b. ...
a2 – b2 = (a + b)(a – b)
(x + a)(x + b) = x2 + (a + b) x + ab.
(a + b + c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ca.
(a + b)3 = a3 + b3 + 3ab (a + b)
(a – b)3 = a3 – b3 – 3ab (a – b)
a3 + b3 + c3– 3abc = (a + b + c)(a2 + b2 + c2 – ab – bc – ca)
please mark as brainylist because Iam also in 9th a navodian
Answered by
4
Answer:
According to class ix , some identities are
- ( a + b )² = a² + 2ab + b²
- ( a – b )2 = a² – 2ab + b²
- a² – b² = ( a + b ) (a – b )
- (x + a ) (x+ b) = x² + (a + b)x + ab.
- (x + y + z)² = x² + y² + z² + 2xy + 2yz + 2zx.
- (x + y)³ = x³ + y³ + 3xy(x + y)
- (x – y)³ = x³ – y³ – 3xy(x – y)
- x³ + y³ + z³ – 3xyz = (x + y + z) (x² + y² + z² – xy – yz – zx)
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