
ա)3 * (a+b)=3a+3b
բ)x * (a-b)=ax-bx
գ)(x+1) * 5=5x+5
դ)(a-b) * x=ax-bx

ա(a+3) * 7=7a+21
բ(x-y) * 10=10x-10y
գa *(x-y)=ax-ay
դa *(a+b)=a^2+ab
ե(a+b-c)* 2=2a+2b-2c
զ(a-b)*(-6)=-6a+-6b
էx *(x-y+c)=x^2-xy+xc
ը(a-b)* 5a=5a^2-5ab

ա(-2)*(x+y)=-2x+-2y
բ(7+ 3y — x^y)*(-2xy)=-14xy+-5xy+2x^3y
գ3ab *(a^2-2a+1)=3a^3b-6a^b+3ab
դ2a *(x+y)=2ax+2ay
ե(x^2+2xy+y^2)*(-12xy^3)=-12×3^3y+-24x^2y^4+-12xy^5
զ21a^2b^5*(a^3-4ab^2-b^2)=21a^5b^5-84a^3b^7-21a^2b^7
է(-abc)*(ab+ab+bc)=-a^2b^2c+-a^2b^2+-ab^2c^2
ը-ac*(a+2c)=-a^2+-2ac^2