Question

v) (a – b)2 = -------
A) a 2 + 2ab + b2
B) a 2 - 2ab + b 2
C) a 2 + 2ab - b 2
D) a 2 - 2ab - b 2

Answer 1

Answer:

D ) a 2 - 2 ab - b 2

this is a ans

Answer 2

Option B) is correct.

$\rm \: (a – b)^2 = a^2 – 2ab + b^2$

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ㅤㅤㅤㅤㅤSome Formula of algebra:-

$\boxed{ \red{ \sf \: a^2 – b^2 = (a – b)(a + b)}}$

$\boxed{ \red{\sf(a + b)^2 = a^2 + 2ab + b^2}}$

$\boxed{ \red{ \sf \: a^2 + b^2 = (a + b)^2 – 2ab}}$

$\boxed{ \red{ \sf (a – b)^2 = a^2 – 2ab + b^2}}$

$\boxed{ \red{ \sf (a + b + c)^2 = a^2 + b^2 + c^2 + 2ab + 2bc + 2ca}}$

$\boxed{ \red{ \sf (a – b – c)^2 = a^2 + b^2 + c^2 – 2ab + 2bc – 2ca}}$

$\boxed{ \red{ \sf (a + b)^3 = a^3 + 3a^2b + 3ab^2 + b^3 ; (a + b)^3 = a^3 + b^3 + 3ab(a + b)}}$

$\boxed{ \red{ \sf (a – b)3 = a^3 – 3a^2b + 3ab^2 – b^3 = a^3 – b^3 – 3ab(a – b)}}$

$\boxed{ \red{ \sf a^3 – b^3 = (a – b)(a^2 + ab + b^2)}}$

$\boxed{ \red{ \sf a^3 + b^3 = (a + b)(a^2 – ab + b^2)}}$

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