Question

Doprowadź wyrażenia do najprostszej postaci.

a) 3(x-2y)+5(2x-y)

b) 3a-(4b+7+5a)-7(2a+5b)

c) 3,5x(8y-2z)-2,5y(4x+6z)-10xz

d)5a(-4b+2)+2b(6a-3)-(a-4b)

e)1 2/5x (10y-5z+15)- 2/3y (-9+12x)

dzięki, daje naj;)

Answer 1

a) 3(x-2y)+5(2x-y)=

=3x-6y+10x-5y=

=13x-11y

b) 3a-(4b+7+5a)-7(2a+5b)=

=3a-4b-7-5a-14a-35b=

=-16a-39b-7

c) 3,5x(8y-2z)-2,5y(4x+6z)-10xz=

=28xy-7xz-10xy-15yz-10xz=

=18xy-17xz-15yz

d)5a(-4b+2)+2b(6a-3)-(a-4b)=

=-20ab+10a+12ab-6b-a+4b=

=-8ab+9a-2b

e)1 2/5x (10y-5z+15)- 2/3y (-9+12x)=

= 14xy-7xz+21x+6y-8xy=

=6xy-7xz+21x+6y

 

licze na naj 

Answer 2

a) 3(x-2y)+5(2x-y)=3x-6y+10x-5y=13x-11y

b) 3a-(4b+7+5a)-7(2a+5b)=3a-4b-7-5a-14a-35b=-16a-39b-7

c) 3,5x(8y-2z)-2,5y(4x+6z)-10xz=28xy-7xz-10xy-15yz-10xz=18xy-17xz-15yz

d)5a(-4b+2)+2b(6a-3)-(a-4b)=-20ab+10a+12ab-6b-a+4b=-8ab+9a-2b

e)1 2/5x (10y-5z+15)- 2/3y (-9+12x)=14xy-7xz+21x+6y-8xy=6xy-7xz+21x+6y