ShmoopTube

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Put this in your calculator and shmoop it...

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If x squared + 2x is greater than or equal to -3 and is less

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than or equal to 3... then x cannot be which of the following?

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And here are the potential answers...

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Make sure you pay attention to the word CANNOT...

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Here's where they're trying to catch you...

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We're looking for the value of x in the answer choices that makes x squared + 2x

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OUTSIDE of the range of -3 and 3.

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We can go ahead and just plug in the answer choices and see what we get.

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(-3)2 + 2(-3) equals 9 minus 6 equals 3. That's true.

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(-2)2 + 2(-2) equals 4 minus 4 equals 0. That's inside the range. True.

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(0)2 + 2(0) equals 0. True.

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(1)2 + 2(1) equals 1 plus 2 equals 3. True. Inside the range.

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(3)2, that's 9, + 2(3), that's 6, Ooh, add them together that's 15.

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Not even close! Way outside the range over here.

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Looks like our answer's E.

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