Question

zadanie 4 s 155 1 gim

a)(x-2)-(2-x)

b)(a+b)+(2a-b)-(a-2b)

c)(3x-y+1)-(x+y)+(y-x)

d)-(2a potęga2 -3ab)-(2b-3a potęga2)+(-ab-a)

wiecie to d :) daje dużo ;d

Answer 1

a)(x-2)-(2-x)=x-2-2+x=2x-4

b)(a+b)+(2a-b)-(a-2b)=a+b+2a-b-a+2b=2a+2b

c)(3x-y+1)-(x+y)+(y-x)=3x-y+1-x-y+y-x=x-y+1

d)-(2a² -3ab)-(2b-3a²)+(-ab-a)=-2a²+3ab-2b+3a²-ab-a=a²+2ab-2b-a

 

Answer 2

a)(x-2)-(2-x) = x-2 -2+x =2x -4

b)(a+b)+(2a-b)-(a-2b) = a+b +2a -b -a+2b = 2a +2b

c)(3x-y+1)-(x+y)+(y-x) = 3x-y+1 -x-y +y-x = x -y +1

d)-(2a² -3ab)-(2b-3a²)+(-ab-a) = -2a² +3ab -2b +3a² -ab-a = a² +2ab -2b-a