a] -3(y-2)+4(y+2)=-3y+6+4y+8=y+14 b] 5(x-y-1)-4(x+2)=5x-5y-5-4x-8=x-5y-13 c] 2(3a+b)-2(a-b)=6a+2b-2a+2b=4a+4b d] ½(4x-4)-2x=2x-2-2x=-2 e] x(x-1)-3(x²-x)=x²-x-3x²+3x=-2x²+2x f] 5a(a-3)-3a(a-5)=5a²-15a-3a²+15a=2a² g] 3x(x+⅓y)-2y(½x-½)=3x²+xy-xy+y=3x²+y
a.) -3(y-2)+4(y+2) = -3y + 6 + 4y + 8 = 14 + y b.) 5(x-y-1)-4(x+2) = 5x - 5y - 5 - 4x - 8 = 5y - x - 13 c.) 2(3a+b)-2(a-b) = 6a + 2b - 2a + 2b = 4a + 4b d.) jedna druga (4x-4)-2x = 2x - 2 - 2x = -2 e.) x(x-1)-3(x do potegi drugiej -x) = x kwadrat - x - 3x kwadrat + 3x = - 2x kwadrat + 2x f.) 5a(a-3)-3a(a-5) = 5a kwadrat - 15 a - 3a kwadrat + 15 a = 2 a kwadrat g.) 3x(x+ jedna trzezcia y) -2y (jedna druga x - jedna druga) = 3x kwadrat + 3xy - xy + y = 3x kwadrat + y
a) -3(y-2)+4(y+2) = -3y + 6 + 4y + 8 = y + 14 b) 5(x-y-1)-4(x+2) = 5x-5y-5-4x-8 = x-5y-13 c) 2(3a+b)-2(a-b) = 6a+2b-2a+2b = 4a+4b d) ½(4x-4)-2x = 2x-2-2x = -2 e) x(x-1)-3(x² -x) = x²-x-3x²+3x = 2x²+2x f) 5a(a-3)-3a(a-5) = 5a²-15a-3a²+15a = 2a² g) 3x(x+ ⅓y) -2y (½x - ½) = 3x²+xy-xy+y = 3x²+y
