Gita expands (1 + √2)² and then subtracts 2√2. Which… | StemPy Lab

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Gita expands (1 + √2)² and then subtracts 2√2. Which… | StemPy Lab

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Gita expands (1 + √2)² and then subtracts 2√2. Which number does she end with?

MathematicsMediumHigh School (9–10)GeneralNumber Systems › Rational and Irrational Numbers

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Gita expands $(1 + \sqrt{2})^2$ and then subtracts $2\sqrt{2}$ . Which number does she end with?

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← x is irrational and q is rational. Which of these must be irrational?A proof that the cube root of 2 is irrational reaches a³ = 2b³. Which fact gives "2 divides a"? →

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