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Mathematics

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Which choice is equivalent to 7x^2 − 4 − (x^2 − 4x − 12)?
A 8x^2 − 4x + 88 x 2 − 4x + 8
B 8x^2 − 4x + 168 x 2 − 4x + 16
C 6x^2 − 4x + 86 x 2 − 4x + 8
D 6x^2 + 4x + 8

Answer :

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