Posted in ՀԱՆՐԱՀԱՇԻՎ, ՄԱԹԵՄԱՏԻԿԱ

Հանրահաշիվ (125 ա, բ, գ։ 126 ա, բ, գ։ 127 ա, թ։ 128 ա,զ։ 129 դ։ 130 ա,ը։ 132)

ա) a*a+a*1+1*a+1*1=a2+2a+1
բ) x*x+x*2+1*x+1*2=x2+2x+x+2
գ) 2*y+2*3+y*y+y*3=2y+6+y+3y

ա) 5m*2n+5m*4m+7n*2n+7n*4m=38mn+20m2+14n
բ) 12a*3a+12a*5b+b*3a+b*5b=36a+63ab+6b
գ) 2x*2x-2x*3y+3y*2x+3y*3y=4x2-12xy+9y2

ա) a*a+a*1+2*a+1*1=a2+2a+1=(a2+2a+1)a+1=a2*a+a2*1+2a*a+2a*1+1*a+1*1=a4+4a+a=4a5
թ) x3*2+x3*3x+2x*2+2x*3x-3*2+3*3x=2x3+3x4+13x+6x2-6

ա) -a*a-a*b-b*a-b*b=-a-ab-ba-b2
զ)

դ) 4a*2a+4a*3-3*2a+3*3=8a2+12a-6a+9=8a2+6a+9

ա) 0,1*x-0,1*0,1+x*x+x*0,1=0,1x-0,1+x+0,1x=0,1x2
ը) 3/2x*7/3y-3/2x*1/3x+y*7/3y-y*1/3=21/6y-3/6x2+7/3y2-1/3y=33/6y2-3/6x2=11/2y2-1/2x2

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