Equivalent Expressions

SAT Math· difficulty 5/5

27x^3 + 1

A
$(3x + 1)(9x^2 - 3x + 1)$
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B
$(3x - 1)(9x^2 + 3x + 1)$
C
$(3x + 1)(9x^2 + 3x + 1)$
D
$(3x + 1)^3$

Explanation

a^3 + b^3 = (a + b)(a^2 - ab + b^2)

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