Question

rozwiązac :
a) (x-1) do kwadratu-(x+1)do kwadratu+(x-1)(x+1)+4x

b)(x+4)*(x-y)-(x+y) do kwadratu+2y (y+x)

daje naj.

Answer 1

a) x do kwadratu + 1

b)y do kwadratu - 4y+4x-xy

Answer 2

A)    (x-1)^ - (x+1)^ + (x-1)(x+1) + 4x=

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

x^-2x+1-x^-2x-1+x^-1+4x=

x^-1=0

x^=1

x=1 lub x=-1 

 

 

(x+4)(x-y) - (x+y)^ +2y(y+x)=

x^-xy+4x-4y - (x^+2xy+y^) +2y^+2x^=

4x-4y+y^