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Equivalent Expressions

SAT Math· difficulty 4/5

Which form of y=x2−4x−5y = x^2 - 4x - 5 best shows its x-intercepts?

  • A

    y=(x−2)2−9y = (x-2)^2 - 9

  • B

    y=(x+5)(x−1)y = (x+5)(x-1)

  • C

    y=x2−4x−5y = x^2 - 4x - 5

  • D

    y=(x−5)(x+1)y = (x-5)(x+1)

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Explanation

Factored form (x−5)(x+1)(x-5)(x+1) shows x-intercepts x=5x = 5 and x=−1x = -1.

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