Խնդիր

3բադ+4սագ=2500գ

4բադ+3սագ=2400գ

բադ, սագ=?

7բադ+7սագ=4900գ

բադ+սագ=700գ

3 բադ+3 սագ=2100գ

սագ=2500գ-2100գ=400գ

բադ=2500-400գ*4=900գ/3=300գ

140 վարժ․

1.a(x-y)+b(y-x)=a(x-y)-b(x-y)=(x-y)*(a-b)

2.x(a-b)+y(b-a)=x(a-b)-y(a-b)=(a-b)*(x-y)

3.3(m-n)-a(n-m)=3(m-n)+a(m-n)=(m-n)*(3+a)

4.7a(a-b)-5(b-a)=7a(a-b)+5(a-b)=(a-b)*(7a+5)

5.a(a-b)+4(b-a)=a(a-b)-4(a-b)=(a-b)*(a-4)

6.6(x-1)-x(1-x)=6(x-1)+x(x-1)=(x-1)*(6+x)

7.p(1-p)-3(p-1)=p(1-p)+3(1-p)=(1-p)*(p+3)

8.x2(y-3)+7(3-y)=x2(y-3)-7(y-3)=(y-3)*(x2-7)

141 վարժ․

1.a(b-1)-(1-b)=a(b-1)+1(b-1)=(b-1)*(a+1)

2.(a+b)+3a(a+b)=(a+b)*(1+3a)

3.2x(a-b)-(b-a)=2x(a-b)+(a-b)=(a-b)*(2x+1)

4.3+a+a(3+a)=(3+a)*(1+a)

5.(m-2n)-x(2n-m)=(m-2n)+x(m-2n)=(m-2n)*(1+x)

6.a-b-x(b-a)=(b-a)+x(b-a)=(b-a)*(x+1)

142 վարժ․

ա/(2x-2a)(3a2-4a+5)=6xa2-8ax+10x-6a3-8a2+10a

բ/(7x2-2x+4-x2)(2x-x-1)=14x3-7x3-7x2-4x2+2x2+2x+8x-4x-4-2x3+x3+x2=6x3-8x2+6x-4

գ/(x3+3x-2)(2x2-x+4)=2x5-x4+ 4x3+6x3-3x2 +12x-4x2+2x+8=2x5 -x4+10x3-7x2+14x+8

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

ե/(2a+1)(3+a)(5a+2)=(6a+2a2+3+a)(5a+2)=(7a+2a2+3)(5a+2)= 35a2+ 14a+10a3+4a2+15a+6 =39a2+10a3+29a+6

զ/(x-3)(2x-1)(7+2x)=(2x2-x-6x+3)(7+2x)=(2x2-7x+3)(7+2x)=14x2+4x3-49x-14x2+21+6x=4x3-43x+21

է/(2m-n)(3n+2m)(m-5n)=(6mn+4m2-3n2-2mn)(m-5n)=(4mn+4m2-3n2)(m-5n)=4m2-20mn2+4m3-5m2n-3n2m+15n3=4m2-23mn2+4m3-5m2n+15n3

ը/(p-8q)(4q-p)(p+8q)=(4pq-p2-p2+8pq)(32q2-8qp-8qp+64q2)=(12pq-p4)(96q4-16qp2)