Question

(a-b) ^2-(a+b) ^2 pls. answer fast. pls. ​

Answer 1

given,

(a-b)²-(a+b)²

a2+b2-2ab-(a²+b²+2ab)

=a²+b²-2ab-a²-b²-2ab

=-4ab

is the answer hope it helps you☺️

Answer 2

${\bigstar}$SOLUTION${\bigstar}$

➥(a-b)²-(a+b) ²

IDENTITY USED :

$\boxed{\sf{ (a+b)² = a² + b² +2ab }}$

$\boxed{\sf{(a-b)² = a² + b² - 2ab }}$

➥(a-b)²-(a+b) ²

➥(a² + b² - 2ab) -( a² + b² +2ab)

➥a² + b² - 2ab - a² - b² -2ab

➥-2ab - 2ab

➥-4ab

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ALGEBRAIC IDENTITIES :

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)