Question

Uprość wyrażenia
a) (3x-y+1)-(x+ y) +(y-x)=
b)9b-3a/3 - 4b-2a/2=
c) 2a(a-5)-3(a2-2a)+(a-2)a=
d) (2x-y)(x+y)=​

Answer 1

d) 2x²+ 2xy-xy-y²

hdjsjsjdjdjkeke

Answer 2

Szczegółowe wyjaśnienie:

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

b) 9b-3a -4b-2a = 3b-a-2b-a = b -2a

3 2

c) 2a•(a-5)-3•(a2-2a)+(a-2)•a = 2a2-10a-3a2+6a+a2-2a = -6a

d) (2x-y)(x+y) = 2x2+2xy-xy = 2x2+xy