Posted in Հանրահաշիվ 7

139-141

ա)xa+xb+ya+yb

բ)a2+ab-ba-b2=a2-b2

գ)mn-3m-2n+6

դ)3x-3y-ax-ab

ե)2a-2ab-3+3b

զ)ab+3a-3b-b2

է)7×2+14xy-4y-2x

ը)a2+ab+a+b

թ)2×2+4xy+3xy+6y2

ժ)2xa-2x-a+1

ա)ab-a-1+b

բ)a+b+3a2+3ab

գ)2xa-2xb-b+a

դ)3+a+3a+a2=3+4a+a2

ե)m-2n-2xn+mx

զ)a-b-xb+ax

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6-6

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