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7 April, 13:34

Which shows a difference of squares?

10y2 - 4x2

16y2 - x2

8x2 - 40x + 25

64x2 - 48x + 9

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  1. 7 April, 17:32
    0
    The second choice 16y2 - x2 shows a difference of squares.

    factoring the second choice results to (4y-x) (4y+x) which results to the difference between 4y and x.

    the first choice also shows a difference in the square however sqrt10 is not a perfect radical.
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