Question

expand (x2+y2)(x2-y2)

Answer 1

$\huge\red{Answer\: is}$


$(x {}^{2} + y {}^{2} )(x {}^{2} - y {}^{2} ) \\ = (x {}^{2} ) {}^{2} - (y {}^{2} ) {}^{2} \\ = x {}^{4} - y {}^{4}$
Hope it helps you

Answer 2

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We know the algebraic identity,

( a + b )( a - b ) = a² - b²

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Here ,

a = x² , b = y² ,

Now ,

( x² + y² )( x² - y² )

= ( x² )² - ( y² )²

= x⁴ - y⁴

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