268)
$9x^2-(x-5)^2$ =
= $9x^2-(x^2-10x+25)$ =
= $8x^2+10x-25$ =
= $(2x+5)(4x-5)$
@gramor 👍👍
@stefanopescetto 👍👍
@remanzini_rinaldo
👍👍👍
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