Question

Please give simple answer for
x²+y²+2xy-z²​

Answer 1

x² + y² + 2xy - z²

rewrite x² + y² + 2xy - z² as ( x + y )² - z² . the difference of squares can be factored using the rule a²- b² = ( a - b ) ( a + b )

( x + y - z ) ( x + y + z )