Question

Usuń nawiasy i zredukuj wyrazy podobne:
a) -[-(-8x+2)-4xy]+8xy-(10-2x)+6x=
b)2ab(2)-(4a(2)b-3b(2)a)-[-(-12ba(2)+3a(2)b(2))]+16a(2)b=
c)-1,2xy-8y(2)-(-5yx+10jedna druga y(2)-8,3)-(-2,3+3,8xy)=
d)8a(2)bc-(4abc(2)+10acb(2))-[-(4c(2)ab+10ab(2)c)-8bca(2)]=
e)(3 i jedna druga x(2)-75y)-5-(1 i jedna druga y+5,5x(2)-3,2)+2x(2)+9y=
f)-3,2x+(-0,8y+2z)-(1,2y-0,8x)-(2z-2,4x)=

Answer 1

a)

-(8x-2-4xy)+8xy-10+2x+6x=

-8x+2+4xy+8xy-10+2x+6x=

-8+12xy=

4(-2+3xy)

 

b)

2ab(2)-(4a(2)b-3b(2)a)-[-(-12ba(2)+3a(2)b(2))]+16a(2)b=

4ab-(8ab-6ab)-[-(-24ab+12ab)]+32ab=

4ab-8ab+6ab-(24ab-12ab)+32ab=

4ab-8ab+6ab-24ab+12ab+32ab=

22ab

 

c)

-1,2xy-8y(2)-(-5yx+10,5 y(2)-8,3)-(-2,3+3,8xy)=

-1,2xy-16y+5xy+21y-8,3+2,3-3,8xy=

5y-6

d)

8a(2)bc-(4abc(2)+10acb(2))-[-(4c(2)ab+10ab(2)c)-8bca(2)]=

16abc-(8abc+20abc)-[-(8abc+20abc)-16abc]=

16abc-8abc-20abc-(-8abc-20abc-16abc)=

16abc-8abc-20abc+8abc+20abc+16abc=

32abc

e)

(3,5 x(2)-75y)-5-(1,5 y+5,5x(2)-3,2)+2x(2)+9y=

7x-75y-5-(1,5y+11x-3,2)+4x+9y=

7x-75y-5-1,5y-11x+3,2+4x+9y=

-67,5y-1,8

f)

-3,2x+(-0,8y+2z)-(1,2y-0,8x)-(2z-2,4x)=

-3,2x-0,8y+2z-1,2y+0,8x-2z+2,4x=

-2y