please send me the answers
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here it is
(2x-5) (x-2) (3x+7) (2x-15)
then
it is
(2x^2-4x-5x+10) (6x^2-45x+14x-135)
it is
(2x^2-9x+10) (6x^2-31x-135)
= 12x^4-62x^3-270x^2-56x^3+279x^2+1215x+60x^2-310x-1350
=12x^4-118x^3+69x^2+905x-1290
ok
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