Հանրահաշիվ Տնային աշխատանք

բ) (7x2-2x+4-x2)(2x-x-1)=(6x2-2x+4)(x-1)=6x3-2x2+4x-6x2+2x-4=6x3-8x2+6x-4

դ) (2m3-7m2+4m)(3-8m+m2)=6m3-21m2+12m-16m4+56m3-32m2+2m5-7m4+4m3=66m3-53m2+12m-23m4+2m5

զ) (x-3)(2x-1)(7+2x)=(x-3)(14x+4x2-7-2x)=(x-3)(12x+4x2-7)=12x2+4x3-7x-36x-12x2+21=4x3-43x+21

ը) (p-8q)(4q-p)(p+8q)=(p-8q)(4pq+32q2-p2-8pq)=(p-8q)(-4pq+32q2-p2)=-4p2q+32pq2-p3+32pq2-256q3+8p2q=4p2q+64pq2-p3-256q3

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