Question

uprość wyrażenia

a x+1/2+2x-1/4=

b -(x+1)+(2x+4)=

c 3(a do kwadratu - 4)-(-a do kwadratu +2)

/ oznacza kreskę ułamkowa

błagamm pomóżcieeee

Answer 1

x+1/2+2x-1/4=3x+1/4

 -(x+1)+(2x+4)=-x-1+2x+4=x+3

3(a do kwadratu - 4)-(-a do kwadratu +2)=3a²-12+a²-2=4a²-14

Answer 2

a) x + 1/2 + 2x - 1/4 =
(2(x+1)+(2x-1))/4 =
(2x+2+2x-1)/4 =
= 4x + 1/4 =
= x + 1/4

b)

- (x + 1) + (2x + 4) =

= -x - 1 + 2x + 4 =
= x + 3

 

 

c) 3(a²-4)-(-a²+2) =
= 3(a² - 4) - (a² + 2) =
= 3a² - 12 - a² - 2 =
= 2a² - 14