1.usuń nawiasy i wykonaj redukcję wyrazów podobnych:
a) 2x-(3x+3)=
b)-7a+(-2)*(a-b)-2b=
c)-(-pq+2p)+4(pq-p)-5p=
d)7x-[4y0(2x+3y)]+(-8x+5y)=
e)-4(x+y)-2(x-y)=
f)0,5(6m-4n)+(2,25)(m+n)=
g)-0,4(8a-10)+1,25(-4a+10do kwadratu)=
h)0,75x(-2/5y-4z)+0,2z(3x-4/3y)=
2.dany jest prostokąt o bokach a i b. o ile zwiekszy się pole prostokąta, gdy bok a zwiększymy o 1, a bok b zwiekszymy 2 razy?
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a)2x-(3x+3=2x-3x-3=-x-3
b)-7a+(-2)*(a-b)=-7a-2a+2b-2b=-9a
c)-(-pq+2p)+4(pq-p)-5p=pq-2p+4pq-4p-5p=5pq-11p
d)7x-[4y0(2x+3y)]+(-8x+5y)=7x-(8xy+12y^2)-8x+5y=-x+5y-8xy-12y^2
e)-4(x+y)-2(x-y)=-4z-4y-2x+2y=-6x-2y
f)0,5(6m-4n)+(2,25)(m+n)=3m-2n+2,25m+2,25n=5,25m+0,25n
g)-0,4(8a-10)+1,25(-4a+10^2)=-2,4a+4-5a+125=-7,4a+129
h)0,75x(-2/5y-4z)+0,2z(3x-4/3y)=3/5-3xz+3/5xz-4/15zy=3/5xy-12/5xz-4/15zy