Which expression is equivalent to open paren 3 x squared minus 7 close paren ?

Distribute the subtraction across each second set of parentheses, then combine like terms. In choice D, (10x² − 4) − (7x² + 3) = 10x² − 4 − 7x² − 3 = 3x² − 7, which matches the expression. The other choices simplify to different expressions.

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