Question

$(x + y + z)2$
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Answer 1

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Answer 2

$\large{\boxed{\bf{Answer}}}$

• (x + y + z)²

=> x² + y² + 2xy + 2yz + 2zx

What you need to know :-

• (x + y)²

=> x² + y² + 2xy

• (x - y)²

=> x² + y² - 2xy

• (x + y)³

=> x³ + y³ + 3x²y + 3xy²

• (x - y)³

=> x³ - y³ - 3x²y + 3xy²

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