(x+y)² - (x-y²) x = √2
x² + 2xy + y² - x + y² = (√2)² + 2*√2y + y² - √2 + y² =
= 2 + 2√2y - √2 + 2y²
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(x+y)² - (x-y²) x = √2
x² + 2xy + y² - x + y² = (√2)² + 2*√2y + y² - √2 + y² =
= 2 + 2√2y - √2 + 2y²