Question

4(x-y)^2 - (x+y)^2

Hey Mates

$\bold \red{plz \: help}$
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Answer 1

${\huge{\red{\bold{HOLA!!!}}}}$

4(x-y)²-(x+y)²

[using identities (a-b)²=a²+b²-2ab

(a+b)²= a²+b²+2ab]

4(x²+y²-2xy)-(x²+y²+2xy)

4x²+4y²-8xy-x²-y²-2xy

4x²-x²+4y²-y²-8xy-2xy

3x²+3y²-10xy

3(x²+y²)-10xy