Which expression is equivalent to open paren 3 x squared minus 7 close paren ?
Answer
A
open paren 15 x squared plus 8 close paren minus open paren 18 x squared plus 1 close paren
B
open paren 2 x squared minus 11 close paren minus open paren x squared plus 4 close paren
C
open paren 10 x squared minus 4 close paren minus open paren 7 x squared plus 3 close paren
Explanation
For choice C, subtract each term in the second parentheses: (10x² − 4) − (7x² + 3) = 10x² − 4 − 7x² − 3 = 3x² − 7. This matches the expression in the question.
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