Question

Usun nawiasy i zredukuj wyrazy podobne

a)-(x² -2xy)-(xy-2x² +4)+3xy-x²

b)-3a-[6a-4b-(5a-5b)]

c)-6x-4y-[-(6x-2y-3x+y)-4x+12+10y]

d)8a²bc-(4abc²+10abc²)-[-(4c²ab+10ab²c)-8bca²]

e) (3 ½x²-7,5y)-5-(1½+5,5x²-3,2)+2x²+9y f)-3,2x+(0,8y+2z)-(1,2y-0,8x)-(2z-2,4x)

g)3(a-3b)-4(2b-4x) h)-5(4a-3b)-4(5a-5b)

i)-3x(2x-3y)+2x(-3x-5y-1)

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

Z gory dziekuje

Answer 1

a)-(x² -2xy)-(xy-2x² +4)+3xy-x²=

=-x^2+2xy-xy+2x^2-4+3xy-x^2=

=2x^2+4xy

b)-3a-[6a-4b-(5a-5b)]=

=-3a-6a+4b+5a-5b=

=-4a-b

c)-6x-4y-[-(6x-2y-3x+y)-4x+12+10y]=

=-6x-4y+6x-2y-3x+y+4x-12-10y=

=x-16y-12

d)8a²bc-(4-abc²+10abc²)-[-(4c²ab+10ab²c)-8bca²]=

=8a²bc-4abc²-10abc²+4c²ab+10ab²c-8bca²=

=-10abc^2+10ab^2c

e) (3 ½x²-7,5y)-5-(1½+5,5x²-3,2)+2x²+9y =

=3 ½x²-7,5y-5-1½-5,5x²+3,2+2x²+9y=

=1,5y-3,3

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=

=-0,4y

g)3(a-3b)-4(2b-4x) h)-5(4a-3b)-4(5a-5b)

i)-3x(2x-3y)+2x(-3x-5y-1)

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

Od g do j nie umiem