How do you solve this?

3 - (x + 2)² = 7 - x²

3 - (x + 2)² = 7 - x²

3 - (x + 2)(x + 2) = 7 - x² {when squaring a binomial, multiply it by itself}

3 - (x² + 4x + 4 = 7 - x² {used foil method}

3 - x² - 4x - 4 = 7 - x² {took out parentheses}

-x² - 4x - 1 = 7 - x² {combined like terms}

-4x - 1 = 7 {added x² to both sides}

-4x = 8 {added 1 to both sides}

**x = -2**{divided both sides by -4}

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