Match each expression to its equivalent standard form. x² - 44 - 4
x² + 4
x²+x+2
x2 - 4x + 8
x² + 2x+21
x² + 16
(x+21)(x-21)
(x-2 +21)(x-2-21)
2
(x + 1 + (x + 1 - 1)

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