Question

simplify (x-y) (x+y+2) for x= -2 ​

Answer 1

Answer:

$\huge { \underline\red {\bf{Solution}}}$

Step-by-step explanation:

⇒ (x + y)(x² - xy + y²)

⇒ x(x² - xy + y²) + y(x² - xy + y²)

⇒ x³ -x²y + xy² +x²y -xy² + y³

⇒ x³ + y³ - x²y + x²y - xy² + xy²

⇒ x³ + y³    (This is actually a identity,you can use while solving problems).,.

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