how would the expression x^2-4 be written using difference of squares

Question

how would the expression x^2-4 be written using difference of squares

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    0
    2021-09-09T02:50:13+00:00

    Difference of squares

    x^2 -a^2 = (x-a) (x+a)

    x^-4 =x-2^2  = (x-2)(x+2)

    0
    2021-09-09T02:50:29+00:00

    a^2 – b^2 = (a + b)(a – b)  so we have a = x and b = 2:-

    x^2 – 4 =  (x + 2)(x – 2) (answer)

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