Հանրահաշիվ Տնային աշխատանք

բ) (x-1)(x-1)(x-1)=(x-1)(x2-x-x+1)=(x-1)(x2-2x+1)=x3-2x2+x-x2+2x-1=x3-3x2+3x-1

դ) (m-n)(m-n)(m+n)=(m-n)(m2+mn-mn-n2=(m-n)(m2-n2)=m3-mn2-m2n+n3

զ) (a-b-c)(a-1)=(a2-ab-ac-a+b+c)

ը) (x-1)(x2+x+1)=x3+x2+x-x2-x-1=x3-1

ժ) (5m2-3mn+n2)(2n-m2)=10m2n-6mn2+2n3-5m4+3m3n-m2n2

լ) (a-b+c)(a-b-c)=a2-ab-ac-ab+b2+bc+ac-bc-c2=a2-2ab+b2-c2

բ) -(x-y)(x+y)=(-x+y)(x+y)=-x2-xy+xy+y2=-x2+y2

դ) -(2m-n)(n-3m)=(-2m+n)(n-3m)=-2mn+6m2+n2-3mn=-5mn+6m2+n2

զ) -7(x+8y)(y-3x)=-7(xy-3x2+8y2-24xy)=-7xy+21x2-56y2+168xy=161xy+21x2-56y2

բ) 8x-3*4x+5=8x-12x+5=-4x+5

դ) 4a-3(2a-3)=4a-6a+9=-2a+9

Թողնել պատասխան

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Փոխել )

Twitter picture

You are commenting using your Twitter account. Log Out /  Փոխել )

Facebook photo

You are commenting using your Facebook account. Log Out /  Փոխել )

Connecting to %s