Answer
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$90x^4+27x^3+9x^2$
Work Step by Step
$90x^4+27x^3+9x^2$
$90x^4+27x^3+9x^2= x^2(90x^2+27x+9)$
$x^2(90x^2+27x+9) = 9x^2(10x^2+3x+1)$
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