Przekształć wyrażenia algebraiczne do najprostszej postaci. a) 2(a - 2b) - 7 (3a - b) =2a - 4b= b) 5(x - y) + 2(4x + 2y) - 3(2x + y) = c) 5(x + 2y - 3z) - 2(4x - 3y + z) d) -(k - m -n) + 2(k + 2m + 3n) - kmn = e) 2p (3p -2r) + 3r(p-2r) =

a) 2(a - 2b) - 7 (3a - b) = 2a-4b-21a+7b = 2a-21a-4b+7b=-19a+3b b) 5(x - y) + 2(4x + 2y) - 3(2x + y) = 5x-5y+8x+4y-6x-3y= 5x+8x-6x-5y+4y-3y=7x-4y c) 5(x + 2y - 3z) - 2(4x - 3y + z) = 5x+10y-15z-8x+6y-2z = -3x+16y -17z d) -(k - m -n) + 2(k + 2m + 3n) - kmn = -k+m+n+2k+4m+6n-kmn=k+5m+7n-kmn e) 2p (3p -2r) + 3r(p-2r) = 6p²-4pr+3pr-6r² = 6p²-6r²-1pr

a) 2(a - 2b) - 7 (3a - b) -2a - 4b= 2a-4b-21a+7b-2a-4b= -21a-b b) 5(x - y) + 2(4x + 2y) - 3(2x + y) = 5x-5y+8x+4y-6x-3y= 7x-4y c) 5(x + 2y - 3z) - 2(4x - 3y + z) 5x+10y-15z-8x+6y-2z= -3x+16y-17z d) -(k - m -n) + 2(k + 2m + 3n) - kmn = -k+m+n+2k+4m+6n-kmn= k+5m+7n-kmn e) 2p (3p -2r) + 3r(p-2r) = 6p²-4pr+3rp-6r²= 6p²-pr-6r²

a) 2(a - 2b) - 7 (3a - b) +2a - 4b= 2a-4b-21a+7b+2a-4b+2a-4b=-15a-5b b)5(x - y)+2(4x+2y)-3(2x+y)=5x-5y+8x+4y-6x-3y=7x-4y c)5(x + 2y - 3z) - 2(4x - 3y + z)=5x+10y-15z-8x+6y-2z=-3x+16y-17z d)-(k-m-n)+2(k+2m+3n)-kmn=-k+m+n+2k+4m+6n-kmn=k+5m+7n-kmn e)2p(3p-2r)+3r(p-2r)=3p²-4pr+3rp-6r²=6p²-4pr+3rp-6r²