Докажите тождество//:

Question

Докажите тождество//:

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Answer 1

с2+2сх=с2+2сх+х2-х2

с2+2сх=с2+2сх

Answer 2

c² + 2cx = (c +x )² - x²

c² + 2cx = c² + 2cx + x² - x²

c² + 2cx = c² + 2cx