Question

tell me all the identies​

Answer 1

Answer:

Identity I: (a + b)2 = a2 + 2ab + b2

Identity II: (a – b)2 = a2 – 2ab + b2

Identity III: a2 – b2= (a + b)(a – b)

Identity IV: (x + a)(x + b) = x2 + (a + b) x + ab

Identity V: (a + b + c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ca

Identity VI: (a + b)3 = a3 + b3 + 3ab (a + b)

Identity VII: (a – b)3 = a3 – b3 – 3ab (a – b)

Identity VIII: a3 + b3 + c3 – 3abc = (a + b + c)(a2 + b2 + c2 – ab – bc – ca)

Answer 2

All the algebriac identities:

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

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

$a {}^{2} - b {}^{2} = (a + b)(a - b)$

$a {}^{3} + b {}^{3 } = (a + b)(a { }^{2} - ab + b {}^{2} )$