Question

x^2 + y^2 + 2xy - z^2​

Answer 1

x^2 + y^2 + 2xy - z^2

(x+y)²-z²

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

Answer 2

☑ x² + y² + 2xy - z²

➡ (x² + y² + 2xy) - z²

➡ (x + y)² - z²

➡ (x + y)² - (z)²

➡ (x + y + z)(x + y - z)

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