Question

wykonaj działania:
a)6(x-4)-2=
b)2(x+1)-3(x-1)=
c)-3(y-2)+4(y+2)=
d)5(x-y-1)-4(x+2)=
e)2(3a+b)-2(a-b)=
f)1/2(4x-4)-2x=
g)x(x-1)-3(x^2-x)=
h)5a(a-3)-3a(a-5)=
i)3x(x+1/3y)-2y(1/2x-1/2)=

Answer 1

a)6(x-4)-2=6x_24-2=6x-22
b)2(x+1)-3(x-1)=2x+2-3x+1=-x+3
c)-3(y-2)+4(y+2)=-3y+6+4y+8=y+14
d)5(x-y-1)-4(x+2)=5x-5y-5-4x-8=x-5y-13
e)2(3a+b)-2(a-b)=6+2b-2a+2b=6+2b-2a
f)1/2(4x-4)-2x=2x-2-2x=2
g)x(x-1)-3(x^2-x)=x^2-x-3x^2+3x=-2x^2+2x
h)5a(a-3)-3a(a-5)=5a^2-15a-3a^2+15a=2a^2
i)3x(x+1/3y)-2y(1/2x-1/2)=3x^2+xy-xy+y=3x^2+y

 

 

wydaje mi sie ze tak