Question

Express each of the following as the difference of two squares:
(x^2+5x-7)(x^2-5x+7)​

Answer 1

Answer:

$= ( {x}^{2} + 5x - 7)( {x}^{2} - 5x + 7) \\ = { ( {x}^{2} } + (5x + 7))( {x }^{2} - (5 x + 7)) \\ = ( x{ {}^{2} })^{2} - ( {5x + 7})^{2}$

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Answer 2

Step-by-step explanation:

(x^2 - 5x + 7) (x^2 + 5x +7)

((x^2 + 7) - 5x)) ((x^2 + 7) + 5x)

(x^2 + 7)^2 - (5x)^2