Question

plz tell me what are the identities of polynomial for class 9 CBSE

plz help fast ​

Answer 1

☆Answer☆

Algebraic Identities

$(x + y) {}^{2} = x {}^{2} + 2xy + y {}^{2}$

$(x - y) {}^{2} = x {}^{2} - 2xy + y {}^{2}$

$x {}^{2} - y {}^{2} = (x + y) (x - y)$

$(x + a )\: (x + b) = x {}^{2} (a + b)x + ab$

$(x + y + z) = x {}^{2} + y {}^{2} + z {}^{2} + 2xy + 2yz + 2zx$