Question

what is the 4th identity of alegbra​

Answer 1

Identity I: (a + b)^2 = a^2 + 2ab + b^2

Identity II: (a - b)^2 = a^2 - 2ab + b^2

Identity III: a^2 – b^2= (a + b)(a – b)

Identity IV: (x + a)(x + b) = x^2 + (a + b) x + ab.

Identity V: (a + b + c)^2 = a^2 + b^2 + c¡2 + 2ab + 2bc + 2ca.

Identity VI: (a + b)^3 = a¡3 + b^3 + 3ab (a + b)

Answer 2

Answer:

Identity I: (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)

Step-by-step explanation:

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