How would the expression x^2-4 be written using difference of squares
2 answers:
Difference of squares
x^2 -a^2 = (x-a) (x+a)
x^-4 =x-2^2 = (x-2)(x+2)
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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