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Equivalent Expressions

SAT Math· difficulty 3/5

Which expression is equivalent to (x+4)(x−4)(x + 4)(x - 4)?

  • A

    x2−8x−16x^2 - 8x - 16

  • B

    x2+8x−16x^2 + 8x - 16

  • C

    x2−16x^2 - 16

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  • D

    x2+16x^2 + 16

Explanation

Difference of squares: (x+4)(x−4)=x2−16(x+4)(x-4) = x^2 - 16.

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