Answer
$(x^2+3)(x−5)(x+5)$
Work Step by Step
$x^4−22x^2−75$
$−22x^2=−25x^2+3x^2$
$x^4−22x^2−75$
$x^4−25x^2+3x^2−75$
$x^2(x^2−25)+3(x^2−25)$
$(x^2+3)(x^2−25)$
$(x^2+3)(x−5)(x+5)$
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